diff --git a/gsrp_tdoa_hyperres.py b/gsrp_tdoa_hyperres.py
index a6b5a09bc7ebd541bcdce0f74469cea2e6546410..5c90b2bb2d90fa42506699448206e6b233a6660a 100755
--- a/gsrp_tdoa_hyperres.py
+++ b/gsrp_tdoa_hyperres.py
@@ -238,10 +238,10 @@ if __name__ == "__main__":
     group2.add_argument('-f', '--frame-size', type=float, default=0.02,
                         help='The size of the cross-correlation frames in seconds  (default: %(default)s)')
     group2_s = group2.add_mutually_exclusive_group()
-    group2_s.add_argument('-s', '--stride', type=str, default='0.01',
+    group2_s.add_argument('-s', '--stride', type=str, default='0.01', dest='stride',
                         help='The step between the beginnings of sequential frames  in seconds (default: %(default)s)')
-    group2_s.add_argument('-p', '--pos', type=str, default='pos.csv',
-                        help='The position in second from csv file path (default: %(default)s)')
+    group2_s.add_argument('-p', '--pos', type=str, dest='stride',
+                        help='The position in second from csv file path. Not allowed if stride is set')
     group2.add_argument('-m', '--max-tdoa', type=float, default=0.0011,
                         help='The maximum TDOA in seconds (default: %(default)s).')