diff --git a/src/hb-set.hh b/src/hb-set.hh
index 71de7a82c..56df9b111 100644
--- a/src/hb-set.hh
+++ b/src/hb-set.hh
@@ -397,6 +397,7 @@ struct hb_set_t
 	  page_map[write_index++] = page_map[i];
       }
       compact (write_index);
+      resize (write_index);
     }
   }