diff --git a/repmgr.c b/repmgr.c
index 4650c147..65ef37aa 100644
--- a/repmgr.c
+++ b/repmgr.c
@@ -870,7 +870,7 @@ do_standby_register(void)
 										NULL, NULL);
 	if (!master_conn)
 	{
-		log_err(_("a master must be defined before configuring a slave\n"));
+		log_err(_("a master must be defined before configuring a standby\n"));
 		exit(ERR_BAD_CONFIG);
 	}
 
@@ -977,7 +977,7 @@ do_standby_unregister(void)
 										NULL, NULL);
 	if (!master_conn)
 	{
-		log_err(_("a master must be defined before unregistering a slave\n"));
+		log_err(_("a master must be defined before unregistering a standby\n"));
 		exit(ERR_BAD_CONFIG);
 	}