diff --git a/src/osgDB/Output.cpp b/src/osgDB/Output.cpp
index 76691b9b3..e491e94b1 100644
--- a/src/osgDB/Output.cpp
+++ b/src/osgDB/Output.cpp
@@ -136,7 +136,7 @@ bool Output::registerUniqueIDForObject(const osg::Object* obj,std::string& uniqu
     return true;
 }
 
-const std::string Output::getFileNameForOutput(const std::string& filename) const
+std::string Output::getFileNameForOutput(const std::string& filename) const
 {
     switch(_pathNameHint)
     {