diff --git a/include/tool/action_toolbar.h b/include/tool/action_toolbar.h
index 305e892ad0..3f6a90b848 100644
--- a/include/tool/action_toolbar.h
+++ b/include/tool/action_toolbar.h
@@ -30,6 +30,7 @@
 #include <wx/aui/auibar.h>
 #include <wx/aui/framemanager.h>
 #include <wx/popupwin.h>
+#include <wx/panel.h>
 #include <tool/action_manager.h>
 #include <tool/tool_action.h>
 #include <tool/tool_event.h>