diff --git a/operations/ensure_prepend.py b/operations/ensure_prepend.py
index 76de8a1d672d6c450309100538c6d7e3454751ed..1c24cfedc53be3d71d71064f551ec9963503ffb2 100755
--- a/operations/ensure_prepend.py
+++ b/operations/ensure_prepend.py
@@ -6,7 +6,7 @@ Filter to modify `setenv` statements in modulefiles to `prepend-path` statements
 Usage:
     tools/ensure_prepend.py PATH MANPATH PYTHONPATH <../build.52.VGk/test.mod
 or
-    module sh-to-module bash somescript.sh | tools/ensure_prepend.py PATH MANPATH PYTHONPATH > path/to/module
+    module sh-to-mod bash somescript.sh | ensure_prepend.py PATH MANPATH PYTHONPATH > path/to/module
 """
 
 import logging