diff --git a/src/zone.c b/src/zone.c
index 5beed5f3..a0372e1a 100644
--- a/src/zone.c
+++ b/src/zone.c
@@ -152,7 +152,7 @@ zone_force_unlock(malloc_zone_t *zone)
 {
 
 	if (isthreaded)
-		jemalloc_postfork();
+		jemalloc_postfork_parent();
 }
 
 malloc_zone_t *