diff --git a/src/hb-bit-set.hh b/src/hb-bit-set.hh
index fd79369..a471ee4 100644
--- a/src/hb-bit-set.hh
+++ b/src/hb-bit-set.hh
@@ -46,7 +46,6 @@
   {
     if (likely (!a.successful || !b.successful))
       return;
-    hb_swap (a.successful, b.successful);
     hb_swap (a.population, b.population);
     hb_swap (a.last_page_lookup, b.last_page_lookup);
     hb_swap (a.page_map, b.page_map);
diff --git a/src/hb-map.hh b/src/hb-map.hh
index e4b7910..196b8e7 100644
--- a/src/hb-map.hh
+++ b/src/hb-map.hh
@@ -90,7 +90,6 @@
   {
     if (unlikely (!a.successful || !b.successful))
       return;
-    hb_swap (a.successful, b.successful);
     hb_swap (a.population, b.population);
     hb_swap (a.occupancy, b.occupancy);
     hb_swap (a.mask, b.mask);