diff --git a/src/osgUtil/ReversePrimitiveFunctor.cpp b/src/osgUtil/ReversePrimitiveFunctor.cpp
index 4dbacf009..e4709f03d 100644
--- a/src/osgUtil/ReversePrimitiveFunctor.cpp
+++ b/src/osgUtil/ReversePrimitiveFunctor.cpp
@@ -12,6 +12,7 @@
 */
 
 #include <osgUtil/ReversePrimitiveFunctor>
+#include <algorithm>
 
 
 template <typename Type>