diff --git a/gst-libs/gst/tag/lang.c b/gst-libs/gst/tag/lang.c
index 1a7de69089..695f93cd72 100644
--- a/gst-libs/gst/tag/lang.c
+++ b/gst-libs/gst/tag/lang.c
@@ -49,6 +49,11 @@
 
 #include "lang-tables.c"
 
+/* FIXME: remove once we depend on GLib >= 2.22 */
+#if !GLIB_CHECK_VERSION (2, 22, 0)
+#define g_mapped_file_unref g_mapped_file_free
+#endif
+
 #ifndef GST_DISABLE_GST_DEBUG
 
 #define GST_CAT_DEFAULT ensure_debug_category()
diff --git a/gst-libs/gst/tag/mklangtables.c b/gst-libs/gst/tag/mklangtables.c
index ab4e56b806..5d4c69323e 100644
--- a/gst-libs/gst/tag/mklangtables.c
+++ b/gst-libs/gst/tag/mklangtables.c
@@ -30,6 +30,10 @@
 #include <glib.h>
 #include <string.h>
 
+#if !GLIB_CHECK_VERSION (2, 22, 0)
+#define g_mapped_file_unref g_mapped_file_free
+#endif
+
 #define ISO_639_XML_PATH ISO_CODES_PREFIX "/share/xml/iso-codes/iso_639.xml"
 
 typedef struct