diff --git a/src/OT/glyf/CompositeGlyph.hh b/src/OT/glyf/CompositeGlyph.hh
index d81fadf7c..057e68d69 100644
--- a/src/OT/glyf/CompositeGlyph.hh
+++ b/src/OT/glyf/CompositeGlyph.hh
@@ -382,7 +382,7 @@ struct CompositeGlyph
     {
       /* last 4 points in points_with_deltas are phantom points and should not be included */
       if (i >= points_with_deltas.length - 4) {
-        free (o);
+        hb_free (o);
         return false;
       }