diff --git a/gm/gm.h b/gm/gm.h
index 8536709..519c9df 100644
--- a/gm/gm.h
+++ b/gm/gm.h
@@ -144,4 +144,7 @@
     };
 }
 
+void MarkGMGood(SkCanvas*, SkScalar x, SkScalar y);
+void MarkGMBad (SkCanvas*, SkScalar x, SkScalar y);
+
 #endif