diff --git a/src/generic/helpext.cpp b/src/generic/helpext.cpp
index abac836452..838d373f04 100644
--- a/src/generic/helpext.cpp
+++ b/src/generic/helpext.cpp
@@ -40,6 +40,10 @@
     #include   <unistd.h>
 #endif
 
+#ifdef __WXMSW__
+#include <windows.h>
+#endif
+
 IMPLEMENT_CLASS(wxExtHelpController, wxHTMLHelpControllerBase)
 
 /**
diff --git a/src/html/htmlwin.cpp b/src/html/htmlwin.cpp
index af8f4639f9..ac2e1d135a 100644
--- a/src/html/htmlwin.cpp
+++ b/src/html/htmlwin.cpp
@@ -28,7 +28,9 @@
 #include "wx/html/htmlwin.h"
 #include "wx/html/forcelnk.h"
 
-
+#ifdef __WXMSW__
+#include <windows.h>
+#endif
 
 //-----------------------------------------------------------------------------
 // wxHtmlWindow