diff --git a/src/emacsgtkfixed.c b/src/emacsgtkfixed.c
--- a/src/emacsgtkfixed.c
+++ b/src/emacsgtkfixed.c
@@ -187,7 +187,9 @@
 	    data[5] += (hints->width_inc - (data[5] % hints->width_inc));
 	  if (data[6] % hints->height_inc)
 	    data[6] += (hints->height_inc - (data[6] % hints->height_inc));
-	}
+	  fprintf (stderr, "XSetWMSizeHints: %ld %ld width_inc: %ld height_inc: %ld\n",
+		   data[5], data[6], hints->width_inc, hints->height_inc);
+	    }
     }
 
   XChangeProperty (d, w, prop, XA_WM_SIZE_HINTS, 32, PropModeReplace,