diff --git a/libnm/nm-vpn-service-plugin.c b/libnm/nm-vpn-service-plugin.c
index 2945a4ea6..25215d96a 100644
--- a/libnm/nm-vpn-service-plugin.c
+++ b/libnm/nm-vpn-service-plugin.c
@@ -424,6 +424,7 @@ connect_timer_start (NMVpnServicePlugin *plugin)
 {
 	NMVpnServicePluginPrivate *priv = NM_VPN_SERVICE_PLUGIN_GET_PRIVATE (plugin);
 
+	nm_clear_g_source (&priv->connect_timer);
 	priv->connect_timer = g_timeout_add_seconds (60, connect_timer_expired, plugin);
 }