diff --git a/packages/babel-generator/src/generators/flow.js b/packages/babel-generator/src/generators/flow.js
index 6c1bad28f9..07b8b2bac4 100644
--- a/packages/babel-generator/src/generators/flow.js
+++ b/packages/babel-generator/src/generators/flow.js
@@ -36,6 +36,11 @@ export function DeclareFunction(node: Object) {
   this.semicolon();
 }
 
+export function DeclareInterface(node: Object) {
+  this.push("declare ");
+  this.InterfaceDeclaration(node);
+}
+
 export function DeclareModule(node: Object) {
   this.push("declare module ");
   this.print(node.id, node);
diff --git a/packages/babel-generator/test/fixtures/flow/declare-statements/actual.js b/packages/babel-generator/test/fixtures/flow/declare-statements/actual.js
index 93559ab69f..1c62d8ee90 100644
--- a/packages/babel-generator/test/fixtures/flow/declare-statements/actual.js
+++ b/packages/babel-generator/test/fixtures/flow/declare-statements/actual.js
@@ -12,3 +12,5 @@ declare class A { static () : number }
 declare class A mixins B<T>, C {}
 declare type A = string
 declare type T<U> = { [k:string]: U }
+declare interface I { foo: string }
+declare interface I<T> { foo: T }
diff --git a/packages/babel-generator/test/fixtures/flow/declare-statements/expected.js b/packages/babel-generator/test/fixtures/flow/declare-statements/expected.js
index e3b7571246..0edb56223a 100644
--- a/packages/babel-generator/test/fixtures/flow/declare-statements/expected.js
+++ b/packages/babel-generator/test/fixtures/flow/declare-statements/expected.js
@@ -12,3 +12,5 @@ declare class A { static (): number }
 declare class A mixins B<T>, C {}
 declare type A = string;
 declare type T<U> = { [k: string]: U };
+declare interface I { foo: string }
+declare interface I<T> { foo: T }
diff --git a/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/declare-statements/actual.js b/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/declare-statements/actual.js
index 93559ab69f..1c62d8ee90 100644
--- a/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/declare-statements/actual.js
+++ b/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/declare-statements/actual.js
@@ -12,3 +12,5 @@ declare class A { static () : number }
 declare class A mixins B<T>, C {}
 declare type A = string
 declare type T<U> = { [k:string]: U }
+declare interface I { foo: string }
+declare interface I<T> { foo: T }
diff --git a/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/declare-statements/expected.js b/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/declare-statements/expected.js
index 2b17e08238..1e0c0a5b06 100644
--- a/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/declare-statements/expected.js
+++ b/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/declare-statements/expected.js
@@ -12,3 +12,5 @@
 /*:: declare class A mixins B<T>, C {}*/
 /*:: declare type A = string*/
 /*:: declare type T<U> = { [k:string]: U }*/
+/*:: declare interface I { foo: string }*/
+/*:: declare interface I<T> { foo: T }*/
diff --git a/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-declare-statements/actual.js b/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-declare-statements/actual.js
index 93559ab69f..1c62d8ee90 100644
--- a/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-declare-statements/actual.js
+++ b/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-declare-statements/actual.js
@@ -12,3 +12,5 @@ declare class A { static () : number }
 declare class A mixins B<T>, C {}
 declare type A = string
 declare type T<U> = { [k:string]: U }
+declare interface I { foo: string }
+declare interface I<T> { foo: T }
diff --git a/packages/babel-types/src/definitions/flow.js b/packages/babel-types/src/definitions/flow.js
index 271afc28b3..1e87ac165f 100644
--- a/packages/babel-types/src/definitions/flow.js
+++ b/packages/babel-types/src/definitions/flow.js
@@ -66,6 +66,14 @@ defineType("DeclareFunction", {
   }
 });
 
+defineType("DeclareInterface", {
+  visitor: ["id", "typeParameters", "extends", "body"],
+  aliases: ["Flow", "FlowDeclaration", "Statement", "Declaration"],
+  fields: {
+    // todo
+  }
+});
+
 defineType("DeclareModule", {
   visitor: ["id", "body"],
   aliases: ["Flow", "FlowDeclaration", "Statement", "Declaration"],
diff --git a/packages/babylon/src/plugins/flow.js b/packages/babylon/src/plugins/flow.js
index d3332907bf..6a72187df1 100644
--- a/packages/babylon/src/plugins/flow.js
+++ b/packages/babylon/src/plugins/flow.js
@@ -60,6 +60,8 @@ pp.flowParseDeclare = function (node) {
     return this.flowParseDeclareModule(node);
   } else if (this.isContextual("type")) {
     return this.flowParseDeclareTypeAlias(node);
+  } else if (this.isContextual("interface")) {
+    return this.flowParseDeclareInterface(node);
   } else {
     this.unexpected();
   }
@@ -104,6 +106,12 @@ pp.flowParseDeclareTypeAlias = function (node) {
   return this.finishNode(node, "DeclareTypeAlias");
 };
 
+pp.flowParseDeclareInterface = function (node) {
+  this.next();
+  this.flowParseInterfaceish(node);
+  return this.finishNode(node, "DeclareInterface");
+}
+
 
 // Interfaces
 
diff --git a/packages/babylon/test/fixtures/flow/declare-statements/15/actual.js b/packages/babylon/test/fixtures/flow/declare-statements/15/actual.js
new file mode 100644
index 0000000000..e5d2353e55
--- /dev/null
+++ b/packages/babylon/test/fixtures/flow/declare-statements/15/actual.js
@@ -0,0 +1,2 @@
+declare interface I { foo: string }
+declare interface I<T> { foo: T }
diff --git a/packages/babylon/test/fixtures/flow/declare-statements/15/expected.json b/packages/babylon/test/fixtures/flow/declare-statements/15/expected.json
new file mode 100644
index 0000000000..d888583822
--- /dev/null
+++ b/packages/babylon/test/fixtures/flow/declare-statements/15/expected.json
@@ -0,0 +1,283 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 69,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 2,
+      "column": 33
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 69,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 2,
+        "column": 33
+      }
+    },
+    "sourceType": "module",
+    "body": [
+      {
+        "type": "DeclareInterface",
+        "start": 0,
+        "end": 35,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 35
+          }
+        },
+        "id": {
+          "type": "Identifier",
+          "start": 18,
+          "end": 19,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 18
+            },
+            "end": {
+              "line": 1,
+              "column": 19
+            }
+          },
+          "name": "I"
+        },
+        "typeParameters": null,
+        "extends": [],
+        "mixins": [],
+        "body": {
+          "type": "ObjectTypeAnnotation",
+          "start": 20,
+          "end": 35,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 20
+            },
+            "end": {
+              "line": 1,
+              "column": 35
+            }
+          },
+          "callProperties": [],
+          "properties": [
+            {
+              "type": "ObjectTypeProperty",
+              "start": 22,
+              "end": 33,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 22
+                },
+                "end": {
+                  "line": 1,
+                  "column": 33
+                }
+              },
+              "key": {
+                "type": "Identifier",
+                "start": 22,
+                "end": 25,
+                "loc": {
+                  "start": {
+                    "line": 1,
+                    "column": 22
+                  },
+                  "end": {
+                    "line": 1,
+                    "column": 25
+                  }
+                },
+                "name": "foo"
+              },
+              "value": {
+                "type": "StringTypeAnnotation",
+                "start": 27,
+                "end": 33,
+                "loc": {
+                  "start": {
+                    "line": 1,
+                    "column": 27
+                  },
+                  "end": {
+                    "line": 1,
+                    "column": 33
+                  }
+                }
+              },
+              "optional": false
+            }
+          ],
+          "indexers": []
+        }
+      },
+      {
+        "type": "DeclareInterface",
+        "start": 36,
+        "end": 69,
+        "loc": {
+          "start": {
+            "line": 2,
+            "column": 0
+          },
+          "end": {
+            "line": 2,
+            "column": 33
+          }
+        },
+        "id": {
+          "type": "Identifier",
+          "start": 54,
+          "end": 55,
+          "loc": {
+            "start": {
+              "line": 2,
+              "column": 18
+            },
+            "end": {
+              "line": 2,
+              "column": 19
+            }
+          },
+          "name": "I"
+        },
+        "typeParameters": {
+          "type": "TypeParameterDeclaration",
+          "start": 55,
+          "end": 58,
+          "loc": {
+            "start": {
+              "line": 2,
+              "column": 19
+            },
+            "end": {
+              "line": 2,
+              "column": 22
+            }
+          },
+          "params": [
+            {
+              "type": "Identifier",
+              "start": 56,
+              "end": 57,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 20
+                },
+                "end": {
+                  "line": 2,
+                  "column": 21
+                }
+              },
+              "name": "T"
+            }
+          ]
+        },
+        "extends": [],
+        "mixins": [],
+        "body": {
+          "type": "ObjectTypeAnnotation",
+          "start": 59,
+          "end": 69,
+          "loc": {
+            "start": {
+              "line": 2,
+              "column": 23
+            },
+            "end": {
+              "line": 2,
+              "column": 33
+            }
+          },
+          "callProperties": [],
+          "properties": [
+            {
+              "type": "ObjectTypeProperty",
+              "start": 61,
+              "end": 67,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 25
+                },
+                "end": {
+                  "line": 2,
+                  "column": 31
+                }
+              },
+              "key": {
+                "type": "Identifier",
+                "start": 61,
+                "end": 64,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 25
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 28
+                  }
+                },
+                "name": "foo"
+              },
+              "value": {
+                "type": "GenericTypeAnnotation",
+                "start": 66,
+                "end": 67,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 30
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 31
+                  }
+                },
+                "typeParameters": null,
+                "id": {
+                  "type": "Identifier",
+                  "start": 66,
+                  "end": 67,
+                  "loc": {
+                    "start": {
+                      "line": 2,
+                      "column": 30
+                    },
+                    "end": {
+                      "line": 2,
+                      "column": 31
+                    }
+                  },
+                  "name": "T"
+                }
+              },
+              "optional": false
+            }
+          ],
+          "indexers": []
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file