diff --git a/packages/babel-generator/src/generators/expressions.js b/packages/babel-generator/src/generators/expressions.js
index 33280ecce8..cb27e684f2 100644
--- a/packages/babel-generator/src/generators/expressions.js
+++ b/packages/babel-generator/src/generators/expressions.js
@@ -6,6 +6,7 @@ import * as t from "babel-types";
 import n from "../node";
 
 const SCIENTIFIC_NOTATION = /e/i;
+const ZERO_DECIMAL_INTEGER = /\.0+$/;
 
 export function UnaryExpression(node: Object) {
   let needsSpace = /[a-z]$/.test(node.operator);
@@ -208,7 +209,7 @@ export function MemberExpression(node: Object) {
   } else {
     if (t.isLiteral(node.object) && !t.isTemplateLiteral(node.object)) {
       let val = this.getPossibleRaw(node.object) || this._stringLiteral(node.object);
-      if (isInteger(+val) && !SCIENTIFIC_NOTATION.test(val) && !this.endsWith(".")) {
+      if (isInteger(+val) && !SCIENTIFIC_NOTATION.test(val) && !ZERO_DECIMAL_INTEGER.test(val) && !this.endsWith(".")) {
         this.push(".");
       }
     }
diff --git a/packages/babel-generator/test/fixtures/types/MemberExpression/actual.js b/packages/babel-generator/test/fixtures/types/MemberExpression/actual.js
index b1b488aa12..9b64980fc1 100644
--- a/packages/babel-generator/test/fixtures/types/MemberExpression/actual.js
+++ b/packages/babel-generator/test/fixtures/types/MemberExpression/actual.js
@@ -9,3 +9,5 @@ foo[test()][bar()];
 
 0..toString();
 0.5.toString();
+1.0.toString();
+1.000.toString();
diff --git a/packages/babel-generator/test/fixtures/types/MemberExpression/expected.js b/packages/babel-generator/test/fixtures/types/MemberExpression/expected.js
index b1b488aa12..9b64980fc1 100644
--- a/packages/babel-generator/test/fixtures/types/MemberExpression/expected.js
+++ b/packages/babel-generator/test/fixtures/types/MemberExpression/expected.js
@@ -9,3 +9,5 @@ foo[test()][bar()];
 
 0..toString();
 0.5.toString();
+1.0.toString();
+1.000.toString();