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-rw-r--r--libdbusmenu-glib/client.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libdbusmenu-glib/client.c b/libdbusmenu-glib/client.c
index 92c7aa9..dd2254e 100644
--- a/libdbusmenu-glib/client.c
+++ b/libdbusmenu-glib/client.c
@@ -836,6 +836,7 @@ gboolean
dbusmenu_client_add_type_handler (DbusmenuClient * client, const gchar * type, DbusmenuClientTypeHandler newfunc)
{
g_return_val_if_fail(DBUSMENU_IS_CLIENT(client), FALSE);
+ g_return_val_if_fail(type != NULL, FALSE);
DbusmenuClientPrivate * priv = DBUSMENU_CLIENT_GET_PRIVATE(client);