diff --git a/src/osgPlugins/txp/trpage_sys.h b/src/osgPlugins/txp/trpage_sys.h
index 5e74cffda..fca258249 100644
--- a/src/osgPlugins/txp/trpage_sys.h
+++ b/src/osgPlugins/txp/trpage_sys.h
@@ -36,6 +36,7 @@
     */
 
 #include <windows.h>
+#include <stdio.h>
 
 // Microsoft Developer warnings that annoy me
 #pragma warning ( disable : 4251)