diff --git a/inversify/inversify-global-tests.ts b/inversify/inversify-global-tests.ts
index 902f23aeac..ab1ac4b119 100644
--- a/inversify/inversify-global-tests.ts
+++ b/inversify/inversify-global-tests.ts
@@ -12,7 +12,7 @@ module global_module_test {
     }
 
     interface IShuriken {
-        throw();
+        throw(): string;
     }
 
     class Katana implements IKatana {