diff --git a/include/osgUtil/IncrementalCompileOperation b/include/osgUtil/IncrementalCompileOperation
index 6325272f5..8c38371bb 100644
--- a/include/osgUtil/IncrementalCompileOperation
+++ b/include/osgUtil/IncrementalCompileOperation
@@ -295,7 +295,7 @@ class OSGUTIL_EXPORT IncrementalCompileOperation : public osg::GraphicsOperation
 
         virtual ~IncrementalCompileOperation();
 
-        void compileSets(CompileSets& toCompile, CompileInfo compileInfo);
+        void compileSets(CompileSets& toCompile, CompileInfo& compileInfo);
 
         double                              _targetFrameRate;
         double                              _minimumTimeAvailableForGLCompileAndDeletePerFrame;
diff --git a/src/osgUtil/IncrementalCompileOperation.cpp b/src/osgUtil/IncrementalCompileOperation.cpp
index 6690ed897..0725f0575 100644
--- a/src/osgUtil/IncrementalCompileOperation.cpp
+++ b/src/osgUtil/IncrementalCompileOperation.cpp
@@ -724,7 +724,7 @@ void IncrementalCompileOperation::operator () (osg::GraphicsContext* context)
     //glFinish();
 }
 
-void IncrementalCompileOperation::compileSets(CompileSets& toCompile, CompileInfo compileInfo)
+void IncrementalCompileOperation::compileSets(CompileSets& toCompile, CompileInfo& compileInfo)
 {
     osg::NotifySeverity level = osg::INFO;