diff --git a/ui/cocoa.m b/ui/cocoa.m
index 563ea47253..e7b29e01f6 100644
--- a/ui/cocoa.m
+++ b/ui/cocoa.m
@@ -784,6 +784,9 @@ QemuCocoaView *cocoaView;
  ------------------------------------------------------
 */
 @interface QemuCocoaAppController : NSObject
+#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6)
+                                             <NSApplicationDelegate>
+#endif
 {
 }
 - (void)startEmulationWithArgc:(int)argc argv:(char**)argv;