diff --git a/healthd/animation.h b/healthd/animation.h
index 562b689..f59fb38 100644
--- a/healthd/animation.h
+++ b/healthd/animation.h
@@ -20,7 +20,7 @@
 #include <inttypes.h>
 #include <string>
 
-struct GRSurface;
+class GRSurface;
 struct GRFont;
 
 namespace android {