diff --git a/hyper.h b/hyper.h
index 36aee3ca..bbeb7f03 100644
--- a/hyper.h
+++ b/hyper.h
@@ -257,7 +257,7 @@ enum eModel : int;
 struct projection_configuration {
   eModel model;            /**< which projection, see classes.cpp */
   ld xposition, yposition; /**< move the center to another position */
-  ld scale, alpha, camera_angle, fisheye_param, twopoint_param, stretch, ballangle, ballproj, euclid_to_sphere;
+  ld scale, alpha, camera_angle, fisheye_param, twopoint_param, axial_angle, stretch, ballangle, ballproj, euclid_to_sphere;
   ld clip_min, clip_max;
   ld model_orientation, halfplane_scale, model_orientation_yz;  
   ld collignon_parameter; 
@@ -308,6 +308,7 @@ struct projection_configuration {
     vr_scale_factor = 1;
     back_and_front = 0;
     dualfocus_autoscale = false;
+    axial_angle = 90;
     }
   };