diff --git a/src/test-ot-glyphname.cc b/src/test-ot-glyphname.cc
index 50d023166..ec6e149a5 100644
--- a/src/test-ot-glyphname.cc
+++ b/src/test-ot-glyphname.cc
@@ -85,5 +85,5 @@ main (int argc, char **argv)
   hb_font_destroy (font);
   hb_face_destroy (face);
 
-  return result;
+  return !result;
 }