diff --git a/include/wx/generic/gridctrl.h b/include/wx/generic/gridctrl.h
index a5833090c4..2ee1c10488 100644
--- a/include/wx/generic/gridctrl.h
+++ b/include/wx/generic/gridctrl.h
@@ -21,6 +21,8 @@
 
 #if wxUSE_DATETIME
 
+#include "wx/datetime.h"
+
 // the default renderer for the cells containing Time and dates..
 class WXDLLIMPEXP_ADV wxGridCellDateTimeRenderer : public wxGridCellStringRenderer
 {