diff --git a/libxfce4panel/xfce-panel-macros.h b/libxfce4panel/xfce-panel-macros.h
index e85443dd1955d03b2c8000cd1b8011df19e54750..b8acf263816f69b67fd0db30a86b612ccec077c8 100644
--- a/libxfce4panel/xfce-panel-macros.h
+++ b/libxfce4panel/xfce-panel-macros.h
@@ -24,6 +24,7 @@
 #define __XFCE_PANEL_MACROS_H__
 
 #include <glib.h>
+#include <glib-object.h>
 #include <libxfce4panel/xfce-panel-plugin.h>
 #include <libxfce4panel/xfce-panel-macros-46.h>