diff --git a/servers/slapd/config.c b/servers/slapd/config.c
index 2816455a34..d65d38655d 100644
--- a/servers/slapd/config.c
+++ b/servers/slapd/config.c
@@ -147,7 +147,7 @@ int config_check_vals(ConfigTable *Conf, ConfigArgs *c, int check_only ) {
 	int rc, arg_user, arg_type, arg_syn, iarg;
 	unsigned uiarg;
 	long larg;
-	unsigned long ularg;
+	size_t ularg;
 	ber_len_t barg;
 	
 	if(Conf->arg_type == ARG_IGNORED) {