diff --git a/src/hb-open-file-private.hh b/src/hb-open-file-private.hh
index 91854f84e..10de3349a 100644
--- a/src/hb-open-file-private.hh
+++ b/src/hb-open-file-private.hh
@@ -139,8 +139,8 @@ struct TTCHeader
   inline bool sanitize (SANITIZE_ARG_DEF) {
     TRACE_SANITIZE ();
     if (!SANITIZE (version)) return false;
-    if (version.major < 1 || version.major > 2) return true;
-    return table.sanitize (SANITIZE_ARG, CharP(this), CharP(this));
+    if (HB_UNLIKELY (version.major < 1 || version.major > 2)) return false;
+    return HB_LIKELY (table.sanitize (SANITIZE_ARG, CharP(this), CharP(this)));
   }
 
   private:
diff --git a/src/hb-ot-layout-gdef-private.hh b/src/hb-ot-layout-gdef-private.hh
index 4f6c1d9c7..4de5740f0 100644
--- a/src/hb-ot-layout-gdef-private.hh
+++ b/src/hb-ot-layout-gdef-private.hh
@@ -346,7 +346,7 @@ struct GDEF
   inline bool sanitize (SANITIZE_ARG_DEF) {
     TRACE_SANITIZE ();
     if (!SANITIZE (version)) return false;
-    if (version.major != 1) return true;
+    if (HB_UNLIKELY (version.major != 1)) return false;
     return SANITIZE_THIS2 (glyphClassDef, attachList) &&
 	   SANITIZE_THIS2 (ligCaretList, markAttachClassDef) &&
 	   (version < 0x00010002 || SANITIZE_THIS (markGlyphSetsDef[0]));
diff --git a/src/hb-ot-layout-gsubgpos-private.hh b/src/hb-ot-layout-gsubgpos-private.hh
index c5639bbba..2856d34f9 100644
--- a/src/hb-ot-layout-gsubgpos-private.hh
+++ b/src/hb-ot-layout-gsubgpos-private.hh
@@ -937,7 +937,7 @@ struct GSUBGPOS
   inline bool sanitize (SANITIZE_ARG_DEF) {
     TRACE_SANITIZE ();
     if (!SANITIZE (version)) return false;
-    if (version.major != 1) return true;
+    if (HB_UNLIKELY (version.major != 1)) return false;
     return SANITIZE_THIS3 (scriptList, featureList, lookupList);
   }