diff --git a/src/osg/DisplaySettings.cpp b/src/osg/DisplaySettings.cpp
index 3108707e4..d0ea1e894 100644
--- a/src/osg/DisplaySettings.cpp
+++ b/src/osg/DisplaySettings.cpp
@@ -253,12 +253,12 @@ void DisplaySettings::readEnvironmentalVariables()
     {
         if (strcmp(ptr,"OFF")==0)
         {
-            _stereo = false;
+            _splitStereoAutoAdjustAspectRatio = false;
         }
         else
         if (strcmp(ptr,"ON")==0)
         {
-            _stereo = true;
+            _splitStereoAutoAdjustAspectRatio = true;
         }
     }