--- a/imsettings-daemon/imsettings-server.c
+++ b/imsettings-daemon/imsettings-server.c
@@ -93,7 +93,7 @@ GDBusInterfaceVTable __iface_vtable = {
 	NULL,
 	NULL,
 };
-guint signals[LAST_SIGNAL];
+extern guint signals[LAST_SIGNAL];
 
 G_DEFINE_TYPE (IMSettingsServer, imsettings_server, G_TYPE_OBJECT);
 G_LOCK_DEFINE_STATIC (logger);