diff --git a/src/ast/nodes/ExportDefaultDeclaration.js b/src/ast/nodes/ExportDefaultDeclaration.js
index ab4a776..81ae1c9 100644
--- a/src/ast/nodes/ExportDefaultDeclaration.js
+++ b/src/ast/nodes/ExportDefaultDeclaration.js
@@ -67,6 +67,8 @@ export default class ExportDefaultDeclaration extends Node {
 					} else {
 						code.overwrite( this.start, this.declaration.start, `${this.module.bundle.varOrConst} ${name} = ` );
 					}
+
+					this.insertSemicolon( code );
 				}
 			} else {
 				// remove `var foo` from `var foo = bar()`, if `foo` is unused
diff --git a/test/form/removes-existing-sourcemap-comments/_expected/amd.js b/test/form/removes-existing-sourcemap-comments/_expected/amd.js
index 99bdf35..b89e399 100644
--- a/test/form/removes-existing-sourcemap-comments/_expected/amd.js
+++ b/test/form/removes-existing-sourcemap-comments/_expected/amd.js
@@ -2,7 +2,7 @@ define(function () { 'use strict';
 
 	var foo = function () {
 		return 42;
-	}
+	};
 
 	console.log( foo() );
 
diff --git a/test/form/removes-existing-sourcemap-comments/_expected/cjs.js b/test/form/removes-existing-sourcemap-comments/_expected/cjs.js
index 8735c93..1152d76 100644
--- a/test/form/removes-existing-sourcemap-comments/_expected/cjs.js
+++ b/test/form/removes-existing-sourcemap-comments/_expected/cjs.js
@@ -2,6 +2,6 @@
 
 var foo = function () {
 	return 42;
-}
+};
 
 console.log( foo() );
diff --git a/test/form/removes-existing-sourcemap-comments/_expected/es.js b/test/form/removes-existing-sourcemap-comments/_expected/es.js
index 2a09cfb..0ef1000 100644
--- a/test/form/removes-existing-sourcemap-comments/_expected/es.js
+++ b/test/form/removes-existing-sourcemap-comments/_expected/es.js
@@ -1,5 +1,5 @@
 var foo = function () {
 	return 42;
-}
+};
 
 console.log( foo() );
diff --git a/test/form/removes-existing-sourcemap-comments/_expected/iife.js b/test/form/removes-existing-sourcemap-comments/_expected/iife.js
index 6381613..cac12fb 100644
--- a/test/form/removes-existing-sourcemap-comments/_expected/iife.js
+++ b/test/form/removes-existing-sourcemap-comments/_expected/iife.js
@@ -3,7 +3,7 @@
 
 	var foo = function () {
 		return 42;
-	}
+	};
 
 	console.log( foo() );
 
diff --git a/test/form/removes-existing-sourcemap-comments/_expected/umd.js b/test/form/removes-existing-sourcemap-comments/_expected/umd.js
index b291566..9a6706d 100644
--- a/test/form/removes-existing-sourcemap-comments/_expected/umd.js
+++ b/test/form/removes-existing-sourcemap-comments/_expected/umd.js
@@ -6,7 +6,7 @@
 
 	var foo = function () {
 		return 42;
-	}
+	};
 
 	console.log( foo() );
 
diff --git a/test/function/adds-semicolons-if-necessary-c/_config.js b/test/function/adds-semicolons-if-necessary-c/_config.js
new file mode 100644
index 0000000..bb17123
--- /dev/null
+++ b/test/function/adds-semicolons-if-necessary-c/_config.js
@@ -0,0 +1,3 @@
+module.exports = {
+	description: 'adds semi-colons if necessary'
+};
diff --git a/test/function/adds-semicolons-if-necessary-c/foo.js b/test/function/adds-semicolons-if-necessary-c/foo.js
new file mode 100644
index 0000000..7dc8833
--- /dev/null
+++ b/test/function/adds-semicolons-if-necessary-c/foo.js
@@ -0,0 +1,3 @@
+export default function () {
+	return 42;
+}
diff --git a/test/function/adds-semicolons-if-necessary-c/main.js b/test/function/adds-semicolons-if-necessary-c/main.js
new file mode 100644
index 0000000..ae0bdb2
--- /dev/null
+++ b/test/function/adds-semicolons-if-necessary-c/main.js
@@ -0,0 +1,7 @@
+import foo from './foo.js';
+
+(function bar() {
+	assert.ok( true );
+})();
+
+assert.equal( foo(), 42 );