diff --git a/gio/gio-autocleanups.h b/gio/gio-autocleanups.h
index 15e37d164..315288e68 100644
--- a/gio/gio-autocleanups.h
+++ b/gio/gio-autocleanups.h
@@ -23,6 +23,8 @@
 #error "Only <gio/gio.h> can be included directly."
 #endif
 
+#ifndef __GI_SCANNER__
+
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GAction, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GActionMap, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GAppInfo, g_object_unref)
@@ -153,3 +155,5 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(GVolume, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GVolumeMonitor, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GZlibCompressor, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GZlibDecompressor, g_object_unref)
+
+#endif /* __GI_SCANNER__ */
diff --git a/glib/glib-autocleanups.h b/glib/glib-autocleanups.h
index 6adf23282..68be87c84 100644
--- a/glib/glib-autocleanups.h
+++ b/glib/glib-autocleanups.h
@@ -23,6 +23,8 @@
 #error "Only <glib.h> can be included directly."
 #endif
 
+#ifndef __GI_SCANNER__
+
 static inline void
 g_autoptr_cleanup_generic_gfree (void *p)
 {
@@ -105,3 +107,5 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC (GPathBuf, g_path_buf_free)
 G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC (GPathBuf, g_path_buf_clear)
 
 G_GNUC_END_IGNORE_DEPRECATIONS
+
+#endif /* __GI_SCANNER__ */
diff --git a/gobject/gobject-autocleanups.h b/gobject/gobject-autocleanups.h
index bddb3f290..23d4f6d4a 100644
--- a/gobject/gobject-autocleanups.h
+++ b/gobject/gobject-autocleanups.h
@@ -23,6 +23,8 @@
 #error "Only <glib-object.h> can be included directly."
 #endif
 
+#ifndef __GI_SCANNER__
+
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GClosure, g_closure_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GEnumClass, g_type_class_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GFlagsClass, g_type_class_unref)
@@ -31,3 +33,5 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(GInitiallyUnowned, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GParamSpec, g_param_spec_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GTypeClass, g_type_class_unref)
 G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(GValue, g_value_unset)
+
+#endif /* __GI_SCANNER__ */