diff --git a/src/util/virbitmap.c b/src/util/virbitmap.c
index 0973731e3ab064e176c6d5a6a7546302052913c3..d1e5a9d1eacfd298a370dbd9bf8a02d037ee3a90 100644
--- a/src/util/virbitmap.c
+++ b/src/util/virbitmap.c
@@ -1317,5 +1317,6 @@ virBitmapShrink(virBitmapPtr map,
         return -1;
 
     map->map_len = nl;
+    map->map_alloc = nl;
     return 0;
 }