diff --git a/libnm-glib/nm-vpn-plugin.c b/libnm-glib/nm-vpn-plugin.c
index 4c4c3161c9..316939ca93 100644
--- a/libnm-glib/nm-vpn-plugin.c
+++ b/libnm-glib/nm-vpn-plugin.c
@@ -686,10 +686,18 @@ impl_vpn_plugin_set_failure (NMVPNPlugin *plugin,
 
 /*****************************************************************************/
 
+static void
+_emit_quit (gpointer data, gpointer user_data)
+{
+	NMVPNPlugin *plugin = data;
+
+	nm_vpn_plugin_emit_quit (plugin);
+}
+
 static void
 sigterm_handler (int signum)
 {
-	g_slist_foreach (active_plugins, (GFunc) nm_vpn_plugin_emit_quit, NULL);
+	g_slist_foreach (active_plugins, _emit_quit, NULL);
 }
 
 static void
diff --git a/libnm/nm-vpn-plugin-old.c b/libnm/nm-vpn-plugin-old.c
index 2b5922b925..897f6d408d 100644
--- a/libnm/nm-vpn-plugin-old.c
+++ b/libnm/nm-vpn-plugin-old.c
@@ -904,10 +904,18 @@ impl_vpn_plugin_old_set_failure (NMVpnPluginOld *plugin,
 
 /*****************************************************************************/
 
+static void
+_emit_quit (gpointer data, gpointer user_data)
+{
+	NMVpnPluginOld *plugin = data;
+
+	nm_vpn_plugin_old_emit_quit (plugin);
+}
+
 static void
 sigterm_handler (int signum)
 {
-	g_slist_foreach (active_plugins, (GFunc) nm_vpn_plugin_old_emit_quit, NULL);
+	g_slist_foreach (active_plugins, _emit_quit, NULL);
 }
 
 static void
diff --git a/libnm/nm-vpn-service-plugin.c b/libnm/nm-vpn-service-plugin.c
index 31e1295488..e4b1df48bd 100644
--- a/libnm/nm-vpn-service-plugin.c
+++ b/libnm/nm-vpn-service-plugin.c
@@ -926,10 +926,18 @@ impl_vpn_service_plugin_set_failure (NMVpnServicePlugin *plugin,
 
 /*****************************************************************************/
 
+static void
+_emit_quit (gpointer data, gpointer user_data)
+{
+	NMVpnServicePlugin *plugin = data;
+
+	nm_vpn_service_plugin_emit_quit (plugin);
+}
+
 static void
 sigterm_handler (int signum)
 {
-	g_slist_foreach (active_plugins, (GFunc) nm_vpn_service_plugin_emit_quit, NULL);
+	g_slist_foreach (active_plugins, _emit_quit, NULL);
 }
 
 static void