diff --git a/examples/osgwindows/osgwindows.cpp b/examples/osgwindows/osgwindows.cpp
index 0bcb4ee19..be2ad3aa1 100644
--- a/examples/osgwindows/osgwindows.cpp
+++ b/examples/osgwindows/osgwindows.cpp
@@ -12,6 +12,7 @@
 #include <osgDB/ReadFile>
 #include <osgUtil/Optimizer>
 #include <osgViewer/Viewer>
+#include <iostream>
 
 int main( int argc, char **argv )
 {