diff --git a/ui/drivers/ui_cocoa.m b/ui/drivers/ui_cocoa.m
index 33cf330678..8b906df7e5 100644
--- a/ui/drivers/ui_cocoa.m
+++ b/ui/drivers/ui_cocoa.m
@@ -525,7 +525,7 @@ static ui_application_t ui_application_cocoa = {
 }
 #endif
 
-#define NS_WINDOW_COLLECTION_BEHAVIOR_FULLSCREEN_PRIMARY (1 << 17)
+#define NS_WINDOW_COLLECTION_BEHAVIOR_FULLSCREEN_PRIMARY (1 << 7)
 
 - (void)applicationDidFinishLaunching:(NSNotification *)aNotification
 {