diff --git a/src/settings/nm-settings-connection.c b/src/settings/nm-settings-connection.c
index 2cd2f0d0ae..2726912f79 100644
--- a/src/settings/nm-settings-connection.c
+++ b/src/settings/nm-settings-connection.c
@@ -431,6 +431,10 @@ nm_settings_connection_replace_settings (NMSettingsConnection *self,
 
 	priv = NM_SETTINGS_CONNECTION_GET_PRIVATE (self);
 
+	nm_utils_normalize_connection (new_connection, TRUE);
+	if (!nm_connection_verify (new_connection, error))
+		return FALSE;
+
 	/* Do nothing if there's nothing to update */
 	if (nm_connection_compare (NM_CONNECTION (self),
 	                           new_connection,