diff --git a/LICENSE.md b/LICENSE.md
index ae037ce..ec3180a 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015 [these people](https://github.com/rollup/rollup/graphs/contributors)
+Copyright (c) 2016 [these people](https://github.com/rollup/rollup/graphs/contributors)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/src/finalisers/amd.js b/src/finalisers/amd.js
index 456dd86..96626e2 100644
--- a/src/finalisers/amd.js
+++ b/src/finalisers/amd.js
@@ -20,7 +20,7 @@ export default function amd ( bundle, magicString, { exportMode, indentString, i
 	const wrapperStart = `define(${params}function (${args.join( ', ' )}) {${useStrict}\n\n`;
 
 	// var foo__default = 'default' in foo ? foo['default'] : foo;
-	const interopBlock = getInteropBlock( bundle );
+	const interopBlock = getInteropBlock( bundle, options );
 	if ( interopBlock ) magicString.prepend( interopBlock + '\n\n' );
 
 	if ( intro ) magicString.prepend( intro );
diff --git a/src/finalisers/iife.js b/src/finalisers/iife.js
index 612f70f..8120594 100644
--- a/src/finalisers/iife.js
+++ b/src/finalisers/iife.js
@@ -49,7 +49,7 @@ export default function iife ( bundle, magicString, { exportMode, indentString,
 	}
 
 	// var foo__default = 'default' in foo ? foo['default'] : foo;
-	const interopBlock = getInteropBlock( bundle );
+	const interopBlock = getInteropBlock( bundle, options );
 	if ( interopBlock ) magicString.prepend( interopBlock + '\n\n' );
 
 	if ( intro ) magicString.prepend( intro );
diff --git a/src/finalisers/shared/getInteropBlock.js b/src/finalisers/shared/getInteropBlock.js
index 67a26d7..6ecdba0 100644
--- a/src/finalisers/shared/getInteropBlock.js
+++ b/src/finalisers/shared/getInteropBlock.js
@@ -1,7 +1,7 @@
-export default function getInteropBlock ( bundle ) {
+export default function getInteropBlock ( bundle, options ) {
 	return bundle.externalModules
 		.map( module => {
-			if ( !module.declarations.default ) return null;
+			if ( !module.declarations.default || options.interop === false ) return null;
 
 			if ( module.exportsNamespace ) {
 				return `${bundle.varOrConst} ${module.name}__default = ${module.name}['default'];`;
diff --git a/src/finalisers/umd.js b/src/finalisers/umd.js
index a36db02..f2be2a2 100644
--- a/src/finalisers/umd.js
+++ b/src/finalisers/umd.js
@@ -66,7 +66,7 @@ export default function umd ( bundle, magicString, { exportMode, indentString, i
 		`.replace( /^\t\t/gm, '' ).replace( /^\t/gm, magicString.getIndentString() );
 
 	// var foo__default = 'default' in foo ? foo['default'] : foo;
-	const interopBlock = getInteropBlock( bundle );
+	const interopBlock = getInteropBlock( bundle, options );
 	if ( interopBlock ) magicString.prepend( interopBlock + '\n\n' );
 
 	if ( intro ) magicString.prepend( intro );
diff --git a/src/rollup.js b/src/rollup.js
index 2ab5b51..be39d0b 100644
--- a/src/rollup.js
+++ b/src/rollup.js
@@ -22,6 +22,7 @@ const ALLOWED_KEYS = [
 	'format',
 	'globals',
 	'indent',
+	'interop',
 	'intro',
 	'moduleId',
 	'moduleName',
diff --git a/test/form/interop-false/_config.js b/test/form/interop-false/_config.js
new file mode 100644
index 0000000..0076e3a
--- /dev/null
+++ b/test/form/interop-false/_config.js
@@ -0,0 +1,7 @@
+module.exports = {
+	description: 'getInterop with interop: false',
+	options: {
+		moduleName: 'foo',
+		interop: false
+	}
+};
diff --git a/test/form/interop-false/_expected/amd.js b/test/form/interop-false/_expected/amd.js
new file mode 100644
index 0000000..3ee81e0
--- /dev/null
+++ b/test/form/interop-false/_expected/amd.js
@@ -0,0 +1,8 @@
+define(['core/view'], function (View) { 'use strict';
+
+	/*eslint import/no-unresolved: 0*/
+	var main = View.extend({});
+
+	return main;
+
+});
\ No newline at end of file
diff --git a/test/form/interop-false/_expected/cjs.js b/test/form/interop-false/_expected/cjs.js
new file mode 100644
index 0000000..4813a5d
--- /dev/null
+++ b/test/form/interop-false/_expected/cjs.js
@@ -0,0 +1,10 @@
+'use strict';
+
+function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
+
+var View = _interopDefault(require('core/view'));
+
+/*eslint import/no-unresolved: 0*/
+var main = View.extend({});
+
+module.exports = main;
\ No newline at end of file
diff --git a/test/form/interop-false/_expected/es.js b/test/form/interop-false/_expected/es.js
new file mode 100644
index 0000000..d404c44
--- /dev/null
+++ b/test/form/interop-false/_expected/es.js
@@ -0,0 +1,6 @@
+import View from 'core/view';
+
+/*eslint import/no-unresolved: 0*/
+var main = View.extend({});
+
+export default main;
\ No newline at end of file
diff --git a/test/form/interop-false/_expected/iife.js b/test/form/interop-false/_expected/iife.js
new file mode 100644
index 0000000..fe0202b
--- /dev/null
+++ b/test/form/interop-false/_expected/iife.js
@@ -0,0 +1,9 @@
+var foo = (function (View) {
+	'use strict';
+
+	/*eslint import/no-unresolved: 0*/
+	var main = View.extend({});
+
+	return main;
+
+}(View));
\ No newline at end of file
diff --git a/test/form/interop-false/_expected/umd.js b/test/form/interop-false/_expected/umd.js
new file mode 100644
index 0000000..2f376e3
--- /dev/null
+++ b/test/form/interop-false/_expected/umd.js
@@ -0,0 +1,12 @@
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('core/view')) :
+	typeof define === 'function' && define.amd ? define(['core/view'], factory) :
+	(global.foo = factory(global.View));
+}(this, (function (View) { 'use strict';
+
+	/*eslint import/no-unresolved: 0*/
+	var main = View.extend({});
+
+	return main;
+
+})));
\ No newline at end of file
diff --git a/test/form/interop-false/main.js b/test/form/interop-false/main.js
new file mode 100644
index 0000000..8d67d61
--- /dev/null
+++ b/test/form/interop-false/main.js
@@ -0,0 +1,3 @@
+/*eslint import/no-unresolved: 0*/
+import View from 'core/view';
+export default View.extend({});
\ No newline at end of file
diff --git a/test/test.js b/test/test.js
index ca11679..5876435 100644
--- a/test/test.js
+++ b/test/test.js
@@ -90,7 +90,7 @@ describe( 'rollup', function () {
 			return rollup.rollup({ entry: 'x', plUgins: [] }).then( () => {
 				throw new Error( 'Missing expected error' );
 			}, err => {
-				assert.equal( err.message, 'Unexpected key \'plUgins\' found, expected one of: acorn, banner, cache, context, dest, entry, exports, external, footer, format, globals, indent, intro, moduleId, moduleName, noConflict, onwarn, outro, paths, plugins, preferConst, sourceMap, sourceMapFile, targets, treeshake, useStrict' );
+				assert.equal( err.message, 'Unexpected key \'plUgins\' found, expected one of: acorn, banner, cache, context, dest, entry, exports, external, footer, format, globals, indent, interop, intro, moduleId, moduleName, noConflict, onwarn, outro, paths, plugins, preferConst, sourceMap, sourceMapFile, targets, treeshake, useStrict' );
 			});
 		});