diff --git a/src/common/inbound.c b/src/common/inbound.c
index dd35ad1c..fabd020e 100644
--- a/src/common/inbound.c
+++ b/src/common/inbound.c
@@ -1160,7 +1160,7 @@ check_autojoin_channels (server *serv)
 		i++;
 
 		/* FIXME this is not going to work and is not needed either. server_free() does the job already. */
-		/* g_slist_free_full (serv->favlist, servlist_favchan_free); */
+		/* g_slist_free_full (serv->favlist, (GDestroyNotify) servlist_favchan_free); */
 	}
 
 	/* This is really only for re-connects when you
diff --git a/src/common/server.c b/src/common/server.c
index c867e86a..9b71d53d 100644
--- a/src/common/server.c
+++ b/src/common/server.c
@@ -2031,7 +2031,7 @@ server_free (server *serv)
 	if (serv->encoding)
 		free (serv->encoding);
 	if (serv->favlist)
-		g_slist_free_full (serv->favlist, servlist_favchan_free);
+		g_slist_free_full (serv->favlist, (GDestroyNotify) servlist_favchan_free);
 
 	fe_server_callback (serv);
 
diff --git a/src/common/servlist.c b/src/common/servlist.c
index b6e28ac7..b55498cc 100644
--- a/src/common/servlist.c
+++ b/src/common/servlist.c
@@ -663,7 +663,7 @@ servlist_connect (session *sess, ircnet *net, gboolean join)
 		{
 			if (serv->favlist)
 			{
-				g_slist_free_full (serv->favlist, servlist_favchan_free);
+				g_slist_free_full (serv->favlist, (GDestroyNotify) servlist_favchan_free);
 			}
 			serv->favlist = g_slist_copy_deep (net->favchanlist, (GCopyFunc) servlist_favchan_copy, NULL);
 		}
@@ -1119,9 +1119,9 @@ servlist_net_remove (ircnet *net)
 		free (net->real);
 	free_and_clear (net->pass);
 	if (net->favchanlist)
-		g_slist_free_full (net->favchanlist, servlist_favchan_free);
+		g_slist_free_full (net->favchanlist, (GDestroyNotify) servlist_favchan_free);
 	if (net->commandlist)
-		g_slist_free_full (net->commandlist, servlist_command_free);
+		g_slist_free_full (net->commandlist, (GDestroyNotify) servlist_command_free);
 	if (net->comment)
 		free (net->comment);
 	if (net->encoding)
diff --git a/src/common/util.c b/src/common/util.c
index 29a0f3ed..a6c9fe21 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -1886,7 +1886,7 @@ int main (int argc, char *argv[])
 	list = get_subdirs ("foo");
 	display_list (list);
 #if GLIB_CHECK_VERSION(2,28,0)
-	g_slist_free_full (list, (GFunc) g_free);
+	g_slist_free_full (list, (GDestroyNotify) g_free);
 #else
 	g_slist_foreach (list, (GFunc) g_free, NULL);
 	g_slist_free (list);