diff --git a/mozilla/docshell/base/nsWebShell.cpp b/mozilla/docshell/base/nsWebShell.cpp
index 2c376858544..28e7836c883 100644
--- a/mozilla/docshell/base/nsWebShell.cpp
+++ b/mozilla/docshell/base/nsWebShell.cpp
@@ -53,6 +53,9 @@
 #include "nsIContent.h"
 #include "prlog.h"
 
+#ifdef XP_PC
+#include <windows.h>
+#endif
 
 //XXX used for nsIStreamObserver implementation.  This sould be replaced by DocLoader
 //    notifications...
diff --git a/mozilla/webshell/src/nsWebShell.cpp b/mozilla/webshell/src/nsWebShell.cpp
index 2c376858544..28e7836c883 100644
--- a/mozilla/webshell/src/nsWebShell.cpp
+++ b/mozilla/webshell/src/nsWebShell.cpp
@@ -53,6 +53,9 @@
 #include "nsIContent.h"
 #include "prlog.h"
 
+#ifdef XP_PC
+#include <windows.h>
+#endif
 
 //XXX used for nsIStreamObserver implementation.  This sould be replaced by DocLoader
 //    notifications...