diff --git a/include/wx/busyinfo.h b/include/wx/busyinfo.h
index 7de6f22fef..94f8fabdcc 100644
--- a/include/wx/busyinfo.h
+++ b/include/wx/busyinfo.h
@@ -13,6 +13,11 @@
 
 #if wxUSE_BUSYINFO
 
+#include "wx/colour.h"
+#include "wx/icon.h"
+
+class WXDLLIMPEXP_FWD_CORE wxWindow;
+
 // This class is used to pass all the various parameters to wxBusyInfo ctor.
 // According to the usual naming conventions (see wxAboutDialogInfo,
 // wxFontInfo, ...) it would be called wxBusyInfoInfo, but this would have been
diff --git a/src/generic/busyinfo.cpp b/src/generic/busyinfo.cpp
index b562b0ab01..cdff39650f 100644
--- a/src/generic/busyinfo.cpp
+++ b/src/generic/busyinfo.cpp
@@ -19,6 +19,7 @@
     #include "wx/busyinfo.h"
     #include "wx/stattext.h"
     #include "wx/panel.h"
+    #include "wx/frame.h"
     #include "wx/sizer.h"
     #include "wx/statbmp.h"
     #include "wx/utils.h"