diff --git a/servers/slapd/slapadd.c b/servers/slapd/slapadd.c
index 1d45cd8a73..09734c6a2d 100644
--- a/servers/slapd/slapadd.c
+++ b/servers/slapd/slapadd.c
@@ -99,6 +99,7 @@ static void *do_put(void *ptr)
 
 	} while (1);
 	ldap_pvt_thread_mutex_unlock( &put_mutex1 );
+	return NULL;
 }
 
 int