diff --git a/panda/src/gui/config_gui.cxx b/panda/src/gui/config_gui.cxx
index 989456c3be..790d7420c0 100644
--- a/panda/src/gui/config_gui.cxx
+++ b/panda/src/gui/config_gui.cxx
@@ -11,6 +11,7 @@
 #include "guiRollover.h"
 #include "guiButton.h"
 #include "guiFrame.h"
+#include "guiListBox.h"
 
 #include <dconfig.h>