diff --git a/ui/drivers/cocoa/cocoa_common.m b/ui/drivers/cocoa/cocoa_common.m
index e68c043e25..e21032eb7a 100644
--- a/ui/drivers/cocoa/cocoa_common.m
+++ b/ui/drivers/cocoa/cocoa_common.m
@@ -150,7 +150,7 @@ void *glkitview_init(void);
 /* NOTE: This version runs on iOS6+. */
 - (NSUInteger)supportedInterfaceOrientations
 {
-   return apple_frontend_settings.orientation_flags;
+   return (NSUInteger)apple_frontend_settings.orientation_flags;
 }
 
 /* NOTE: This version runs on iOS2-iOS5, but not iOS6+. */