diff --git a/src/osgUtil/TriStrip_tri_stripper.h b/src/osgUtil/TriStrip_tri_stripper.h
index 00433c157..1da7a3400 100644
--- a/src/osgUtil/TriStrip_tri_stripper.h
+++ b/src/osgUtil/TriStrip_tri_stripper.h
@@ -57,6 +57,9 @@
 #ifndef TRISTRIP_TRI_STRIPPER_H
 #define TRISTRIP_TRI_STRIPPER_H
 
+// include this to supress daft VisualStudio warnings.
+#include <osg/Export>
+
 #include <algorithm>
 #include <deque>
 #include <list>