diff --git a/include/osgDB/ConvertUTF b/include/osgDB/ConvertUTF
index bb6e5b6b4..c40d0a340 100644
--- a/include/osgDB/ConvertUTF
+++ b/include/osgDB/ConvertUTF
@@ -18,6 +18,7 @@
 #include <osgDB/Export>
 
 #include <string>
+#include <string.h>
 
 namespace osgDB
 {