diff --git a/scripts/field_to_field.py b/scripts/field_to_field.py
index dbb93a5..b2bae83 100644
--- a/scripts/field_to_field.py
+++ b/scripts/field_to_field.py
@@ -125,7 +125,7 @@ if __name__ == "__main__":
     parser.add_argument("-L","--output_L", type=float, nargs="+", default=None, help="Output field size (L0, L1, L2)")
     parser.add_argument("-dpm","--output_dpm", type=float, nargs="+", default=None, help="Output field dpm (d0, d1, d2)")
     parser.add_argument("-corner","--output_corner", type=float, nargs=3, default=(0.,0.,0.), help="Output field corner (corner0, corner1, corner2)")
-    parser.add_argument("-BC","--boundary_conditions", type=int, default=1, help="Boundary conditions (0: periodic, 1: non-periodic)")
+    parser.add_argument("-BC","--boundary_conditions", type=int, default=1, help="Boundary conditions (1: periodic, 3: non-periodic)")
     args = parser.parse_args()
 
     field_to_field(args.input_file, args.output_file, args.output_size, args.output_L, args.output_dpm, args.output_corner, args.boundary_conditions)
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