diff --git a/src/acorn/src/tokentype.js b/src/acorn/src/tokentype.js
index 05d1d53186..1ae2d0a297 100755
--- a/src/acorn/src/tokentype.js
+++ b/src/acorn/src/tokentype.js
@@ -112,7 +112,7 @@ kw("case", beforeExpr)
 kw("catch")
 kw("continue")
 kw("debugger")
-kw("default")
+kw("default", beforeExpr)
 kw("do", {isLoop: true})
 kw("else", beforeExpr)
 kw("finally")
diff --git a/test/acorn/tests-harmony.js b/test/acorn/tests-harmony.js
index 8d93337f4d..16a40c6d54 100755
--- a/test/acorn/tests-harmony.js
+++ b/test/acorn/tests-harmony.js
@@ -15328,3 +15328,5 @@ test("({ ['__proto__']: 1, __proto__: 2 })", {}, {ecmaVersion: 6});
 test("({ __proto__() { return 1 }, __proto__: 2 })", {}, {ecmaVersion: 6});
 test("({ get __proto__() { return 1 }, __proto__: 2 })", {}, {ecmaVersion: 6});
 test("({ __proto__, __proto__: 2 })", {}, {ecmaVersion: 6});
+
+test("export default /foo/", {}, {ecmaVersion: 6, sourceType: "module"});