diff --git a/gio/gsettings.h b/gio/gsettings.h
index 9ace2e4a5..d15baaeef 100644
--- a/gio/gsettings.h
+++ b/gio/gsettings.h
@@ -8,8 +8,8 @@
  * See the included COPYING file for more information.
  */
 
-#ifndef _gsettings_h_
-#define _gsettings_h_
+#ifndef __G_SETTINGS_H__
+#define __G_SETTINGS_H__
 
 #include "gsettingsbackend.h"
 
@@ -111,4 +111,4 @@ void                    g_settings_unbind                               (gpointe
 
 G_END_DECLS
 
-#endif /* _gsettings_h_ */
+#endif  /* __G_SETTINGS_H__ */
diff --git a/gio/gsettingsbackend.h b/gio/gsettingsbackend.h
index 99d9f8054..10a210fea 100644
--- a/gio/gsettingsbackend.h
+++ b/gio/gsettingsbackend.h
@@ -8,8 +8,8 @@
  * See the included COPYING file for more information.
  */
 
-#ifndef _gsettingsbackend_h_
-#define _gsettingsbackend_h_
+#ifndef __G_SETTINGS_BACKEND_H__
+#define __G_SETTINGS_BACKEND_H__
 
 #include <glib-object.h>
 
@@ -111,4 +111,4 @@ gboolean      g_settings_backend_class_supports_context (GSettingsBackendClass *
 
 G_END_DECLS
 
-#endif /* _gsettingsbackend_h_ */
+#endif  /* __G_SETTINGS_BACKEND_H__ */