diff --git a/config.h.meson b/config.h.meson
index c67e1792f..3f310b3c9 100644
--- a/config.h.meson
+++ b/config.h.meson
@@ -247,6 +247,9 @@
 /* Define if libelf is available */
 #mesondefine HAVE_LIBELF
 
+/* Define if libmount is available */
+#mesondefine HAVE_LIBMOUNT
+
 /* Define to 1 if you have the <linux/magic.h> header file. */
 #mesondefine HAVE_LINUX_MAGIC_H
 
diff --git a/meson.build b/meson.build
index 208c23087..cd9cbf2ce 100644
--- a/meson.build
+++ b/meson.build
@@ -1535,6 +1535,7 @@ if use_system_pcre
 endif
 if libmount_dep.length() == 1 and libmount_dep[0].found()
   glib_conf.set('LIBMOUNT_LIBS', '-lmount')
+  glib_conf.set('HAVE_LIBMOUNT', 1)
 endif
 glib_conf.set('GIO_MODULE_DIR', '${libdir}/gio/modules')
 # FIXME: Missing: