diff --git a/gobject/gboxed.c b/gobject/gboxed.c
index 67d63514d..37ce60452 100644
--- a/gobject/gboxed.c
+++ b/gobject/gboxed.c
@@ -155,6 +155,7 @@ G_DEFINE_BOXED_TYPE (GError, g_error, g_error_copy, g_error_free)
 G_DEFINE_BOXED_TYPE (GDateTime, g_date_time, g_date_time_ref, g_date_time_unref);
 G_DEFINE_BOXED_TYPE (GTimeZone, g_time_zone, g_time_zone_ref, g_time_zone_unref);
 G_DEFINE_BOXED_TYPE (GKeyFile, g_key_file, g_key_file_ref, g_key_file_unref)
+G_DEFINE_BOXED_TYPE (GMappedFile, g_mapped_file, g_mapped_file_ref, g_mapped_file_unref)
 
 G_DEFINE_BOXED_TYPE (GMainLoop, g_main_loop, g_main_loop_ref, g_main_loop_unref)
 G_DEFINE_BOXED_TYPE (GMainContext, g_main_context, g_main_context_ref, g_main_context_unref)
diff --git a/gobject/glib-types.h b/gobject/glib-types.h
index 663d7902f..34d5d1a59 100644
--- a/gobject/glib-types.h
+++ b/gobject/glib-types.h
@@ -254,6 +254,15 @@ typedef gsize GType;
  */
 #define G_TYPE_KEY_FILE (g_key_file_get_type ())
 
+/**
+ * G_TYPE_MAPPED_FILE:
+ *
+ * The #GType for a boxed type holding a #GMappedFile.
+ *
+ * Since: 2.40
+ */
+#define G_TYPE_MAPPED_FILE (g_mapped_file_get_type ())
+
 /**
  * G_TYPE_THREAD:
  *
@@ -322,6 +331,8 @@ GLIB_AVAILABLE_IN_2_36
 GType   g_checksum_get_type        (void) G_GNUC_CONST;
 GLIB_AVAILABLE_IN_2_36
 GType   g_markup_parse_context_get_type (void) G_GNUC_CONST;
+GLIB_AVAILABLE_IN_2_40
+GType   g_mapped_file_get_type (void) G_GNUC_CONST;
 
 GLIB_DEPRECATED_FOR('G_TYPE_VARIANT')
 GType   g_variant_get_gtype        (void) G_GNUC_CONST;