diff --git a/src/fprintd.h b/src/fprintd.h
index 4075bc2..63a742e 100644
--- a/src/fprintd.h
+++ b/src/fprintd.h
@@ -91,3 +91,18 @@ FprintDevice *fprint_device_new (FpDevice *dev);
 guint32 _fprint_device_get_id (FprintDevice *rdev);
 /* Print */
 /* TODO */
+
+
+/* Some compatibility definitions for older GLib. Copied from from libfprint. */
+#if !GLIB_CHECK_VERSION (2, 57, 0)
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (GTypeClass, g_type_class_unref);
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (GEnumClass, g_type_class_unref);
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (GFlagsClass, g_type_class_unref);
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (GParamSpec, g_param_spec_unref);
+#else
+/* Re-define G_SOURCE_FUNC as we are technically not allowed to use it with
+ * the version we depend on currently. */
+#undef G_SOURCE_FUNC
+#endif
+
+#define G_SOURCE_FUNC(f) ((GSourceFunc) (void (*)(void))(f))