diff --git a/src/propgrid/propgridpagestate.cpp b/src/propgrid/propgridpagestate.cpp
index 425ab026da..859dff0d51 100644
--- a/src/propgrid/propgridpagestate.cpp
+++ b/src/propgrid/propgridpagestate.cpp
@@ -45,6 +45,7 @@
     #include "wx/statusbr.h"
     #include "wx/intl.h"
     #include "wx/frame.h"
+    #include "wx/stopwatch.h"
 #endif
 
 // This define is necessary to prevent macro clearing