diff --git a/include/wx/propgrid/propgrid.h b/include/wx/propgrid/propgrid.h
index f51639b39d..4b1ac95968 100644
--- a/include/wx/propgrid/propgrid.h
+++ b/include/wx/propgrid/propgrid.h
@@ -22,6 +22,7 @@
 #include "wx/tooltip.h"
 #include "wx/datetime.h"
 #include "wx/recguard.h"
+#include "wx/time.h" // needed for wxMilliClock_t
 
 #include "wx/propgrid/property.h"
 #include "wx/propgrid/propgridiface.h"