diff --git a/src/osgWidget/Input.cpp b/src/osgWidget/Input.cpp
index 2a9d3f891..55d181479 100644
--- a/src/osgWidget/Input.cpp
+++ b/src/osgWidget/Input.cpp
@@ -3,6 +3,7 @@
 #include <osg/io_utils>
 #include <osgWidget/WindowManager>
 #include <osgWidget/Input>
+#include <iterator>
 
 #ifdef WIN32
 #include <windows.h>