diff --git a/include/osg/AnimationPath b/include/osg/AnimationPath
index 96814443e..0cbed58e8 100644
--- a/include/osg/AnimationPath
+++ b/include/osg/AnimationPath
@@ -170,7 +170,7 @@ class SG_EXPORT AnimationPath : public virtual osg::Object
         void read(std::istream& in);
 
         /** write the anumation path to a flat ascii file stream.*/
-        void write(std::ostream& out);
+        void write(std::ostream& out) const;
 
     protected:
     
@@ -187,13 +187,12 @@ class SG_EXPORT AnimationPathCallback : public NodeCallback
     public:
 
         AnimationPathCallback():
+            _useInverseMatrix(false),
             _timeOffset(0.0),
             _timeMultiplier(1.0),
             _firstTime(DBL_MAX),
             _latestTime(0.0),
-            _pause(false),
             _pauseTime(0.0) {}
-            
 
         AnimationPathCallback(const AnimationPathCallback& apc,const CopyOp& copyop):
             NodeCallback(apc,copyop),
diff --git a/src/osg/AnimationPath.cpp b/src/osg/AnimationPath.cpp
index 0360749cd..62648c9a3 100644
--- a/src/osg/AnimationPath.cpp
+++ b/src/osg/AnimationPath.cpp
@@ -95,7 +95,7 @@ void AnimationPath::read(std::istream& in)
     }
 }
 
-void AnimationPath::write(std::ostream& fout)
+void AnimationPath::write(std::ostream& fout) const
 {
     const TimeControlPointMap& tcpm = getTimeControlPointMap();
     for(TimeControlPointMap::const_iterator tcpmitr=tcpm.begin();