diff --git a/hw/xquartz/darwinEvents.c b/hw/xquartz/darwinEvents.c
index 147b32a09..7b34b8a05 100644
--- a/hw/xquartz/darwinEvents.c
+++ b/hw/xquartz/darwinEvents.c
@@ -238,8 +238,8 @@ static void DarwinEventHandler(int screenNum, InternalEvent *ie, DeviceIntPtr de
             
         case kXquartzToggleFullscreen:
             DEBUG_LOG("kXquartzToggleFullscreen\n");
-            if (quartzEnableRootless) 
-                QuartzSetFullscreen(!quartzHasRoot);
+            if(quartzEnableRootless) 
+                ErrorF("Ignoring kXquartzToggleFullscreen because of rootless mode.");
             else if (quartzHasRoot)
                 QuartzHide();
             else