diff --git a/gio/gnextstepsettingsbackend.c b/gio/gnextstepsettingsbackend.c
index c8daca3a3..99d164f36 100644
--- a/gio/gnextstepsettingsbackend.c
+++ b/gio/gnextstepsettingsbackend.c
@@ -25,6 +25,8 @@
 
 #import <Foundation/Foundation.h>
 
+GType g_nextstep_settings_backend_get_type (void);
+
 #define G_NEXTSTEP_SETTINGS_BACKEND(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), g_nextstep_settings_backend_get_type (), GNextstepSettingsBackend))
 
 typedef struct _GNextstepSettingsBackend GNextstepSettingsBackend;