diff --git a/README.md b/README.md
index c96a764..aab5311 100644
--- a/README.md
+++ b/README.md
@@ -100,5 +100,5 @@ $ python polyline_to_points.py path/to/shp
 $ python polyline_to_points.py -s 5 path/to/shp
 
 # Use profile names from field "ProfileID" in the attribute table at 1 m spacing
-$ python polyline_to_points.py -f -s 1 ProfileID path/to/shp
+$ python polyline_to_points.py -f ProfileID -s 1 path/to/shp
 ```