diff --git a/libs/tk/ydk/quartz/GdkQuartzView.c b/libs/tk/ydk/quartz/GdkQuartzView.c
index 392ab2a856..cdd056881e 100644
--- a/libs/tk/ydk/quartz/GdkQuartzView.c
+++ b/libs/tk/ydk/quartz/GdkQuartzView.c
@@ -759,7 +759,13 @@ static int showInvalidation = 0;
       return;
     }
 
-    if (!impl->needs_display_region || gdk_quartz_get_use_cocoa_invalidation() || full_draw) {
+    if (full_draw) {
+      GdkRectangle r = { rect.origin.x, rect.origin.y, rect.size.width, rect.size.height };
+      region = gdk_region_rectangle (&r);
+      if (impl->needs_display_region) {
+	gdk_region_destroy (impl->needs_display_region);
+      }
+    } else if (!impl->needs_display_region || gdk_quartz_get_use_cocoa_invalidation()) {
        gint nrects;
        GdkRectangle* rects;
        [self getRectsBeingDrawn: &drawn_rects count: &count];