diff --git a/src/hb-set-private.hh b/src/hb-set-private.hh
index 9c6f3ee37aa324023150838ac09f3bcf3c5fb3ed..576c169e6780f3be69701a259bdac2c209ef4ab9 100644
--- a/src/hb-set-private.hh
+++ b/src/hb-set-private.hh
@@ -185,6 +185,7 @@ struct hb_set_t
 
   inline void init (void)
   {
+    in_error = false;
     page_map.init ();
     pages.init ();
   }