diff --git a/utils/api_demos/mainGlut.cpp b/utils/api_demos/mainGlut.cpp
index 1792801bdaeb38d02f7356a54468de26b00231ba..e16a0dbfafd708e8377504d3841436f601846b4f 100644
--- a/utils/api_demos/mainGlut.cpp
+++ b/utils/api_demos/mainGlut.cpp
@@ -420,7 +420,7 @@ int main(int argc, char **argv)
   GmshSetOption("General", "Camera", 1.);
   GmshSetOption("General", "Orthographic", 0.);
   GmshSetOption("General", "TrackballHyperbolicSheet", 0.);
-  CTX::instance()->trackballHyperbolicSheet=0;
+
   if (strstr(argv[1],"-s") != NULL){
    camera.stereoEnable = true;
    cout<<"mode STEREO"<<endl;