diff --git a/include/wx/html/htmlwin.h b/include/wx/html/htmlwin.h
index 7ca29a3155..016782b6d6 100644
--- a/include/wx/html/htmlwin.h
+++ b/include/wx/html/htmlwin.h
@@ -26,6 +26,7 @@
 #include "wx/filesys.h"
 #include "wx/html/htmlfilt.h"
 #include "wx/filename.h"
+#include "wx/bitmap.h"
 
 class wxHtmlProcessor;
 class wxHtmlWinModule;