diff --git a/src/osg/AutoTransform.cpp b/src/osg/AutoTransform.cpp
index acb3634f6..f489d3157 100644
--- a/src/osg/AutoTransform.cpp
+++ b/src/osg/AutoTransform.cpp
@@ -23,6 +23,8 @@ AutoTransform::AutoTransform():
     _autoScaleToScreen(false),
     _scale(1.0,1.0,1.0),
     _firstTimeToInitEyePoint(true),
+    _previousWidth(0),
+    _previousHeight(0),
     _minimumScale(0.0),
     _maximumScale(DBL_MAX),
     _autoScaleTransitionWidthRatio(0.25),
@@ -45,6 +47,8 @@ AutoTransform::AutoTransform(const AutoTransform& pat,const CopyOp& copyop):
     _rotation(pat._rotation),
     _scale(pat._scale),
     _firstTimeToInitEyePoint(true),
+    _previousWidth(0),
+    _previousHeight(0),
     _minimumScale(pat._minimumScale),
     _maximumScale(pat._maximumScale),
     _autoScaleTransitionWidthRatio(pat._autoScaleTransitionWidthRatio),