diff --git a/libs/tk/ydk/quartz/GdkQuartzView.c b/libs/tk/ydk/quartz/GdkQuartzView.c
index cdd056881e..2e04c7e776 100644
--- a/libs/tk/ydk/quartz/GdkQuartzView.c
+++ b/libs/tk/ydk/quartz/GdkQuartzView.c
@@ -728,7 +728,9 @@ static int showInvalidation = 0;
 
   if (NSContainsRect (rect, [self bounds])) {
 	  full_draw = TRUE;
+#ifndef NDEBUG
 	  printf ("full draw seen!\n");
+#endif
   } else {
 	  full_draw = FALSE;
   }