diff --git a/include/wx/dialup.h b/include/wx/dialup.h
index 27a0c033c9..6c9feb4fc9 100644
--- a/include/wx/dialup.h
+++ b/include/wx/dialup.h
@@ -18,6 +18,8 @@
 
 #if wxUSE_DIALUP_MANAGER
 
+#include "wx/event.h"
+
 // ----------------------------------------------------------------------------
 // misc
 // ----------------------------------------------------------------------------