diff --git a/src/wm-tester/test-resizing.c b/src/wm-tester/test-resizing.c
index f94810042..616786fea 100644
--- a/src/wm-tester/test-resizing.c
+++ b/src/wm-tester/test-resizing.c
@@ -79,7 +79,7 @@ get_size (Display *d, Drawable draw,
     *yp = y;
   if (widthp)
     *widthp = width;
-  if (*heightp)
+  if (heightp)
     *heightp = height;
 }