diff --git a/src/hb-ot-layout-common-private.hh b/src/hb-ot-layout-common-private.hh
index 4973a1351..81e4dc911 100644
--- a/src/hb-ot-layout-common-private.hh
+++ b/src/hb-ot-layout-common-private.hh
@@ -202,7 +202,7 @@ struct Script
 
   inline bool sanitize (SANITIZE_ARG_DEF) {
     TRACE_SANITIZE ();
-    return SANITIZE_THIS (defaultLangSys) && SANITIZE_THIS (langSys);
+    return SANITIZE_THIS2 (defaultLangSys, langSys);
   }
 
   private: