diff --git a/xaphoon.py b/xaphoon.py
index ea8d94a..6fd4a81 100755
--- a/xaphoon.py
+++ b/xaphoon.py
@@ -62,7 +62,7 @@ def main():
                         type=float)
     parser.add_argument("elevation",
                         help="Observer elevation in meters",
-                        type=int)
+                        type=float)
     parser.add_argument("-l", "--lines",
                         help="Number of lines for the output to use (default 25)",
                         default=25,