diff --git a/src/osg/DisplaySettings.cpp b/src/osg/DisplaySettings.cpp
index f036dc6a0..a00fb3e71 100644
--- a/src/osg/DisplaySettings.cpp
+++ b/src/osg/DisplaySettings.cpp
@@ -307,6 +307,8 @@ void DisplaySettings::readCommandLine(ArgumentParser& arguments)
         else if (arguments.match(pos+1,"QUAD_BUFFER"))      { arguments.remove(pos,2); _stereo = true;_stereoMode = QUAD_BUFFER; }
         else if (arguments.match(pos+1,"HORIZONTAL_SPLIT")) { arguments.remove(pos,2); _stereo = true;_stereoMode = HORIZONTAL_SPLIT; }
         else if (arguments.match(pos+1,"VERTICAL_SPLIT"))   { arguments.remove(pos,2); _stereo = true;_stereoMode = VERTICAL_SPLIT; }
+        else if (arguments.match(pos+1,"HORIZONTAL_INTERLACE")) { arguments.remove(pos,2); _stereo = true;_stereoMode = HORIZONTAL_INTERLACE; }
+        else if (arguments.match(pos+1,"VERTICAL_INTERLACE"))   { arguments.remove(pos,2); _stereo = true;_stereoMode = VERTICAL_INTERLACE; }
         else if (arguments.match(pos+1,"LEFT_EYE"))         { arguments.remove(pos,2); _stereo = true;_stereoMode = LEFT_EYE; }
         else if (arguments.match(pos+1,"RIGHT_EYE"))        { arguments.remove(pos,2); _stereo = true;_stereoMode = RIGHT_EYE; }
         else if (arguments.match(pos+1,"ON"))               { arguments.remove(pos,2); _stereo = true; }