diff --git a/parent-urls b/parent-urls
index 6e961cb..85b89c0 100755
--- a/parent-urls
+++ b/parent-urls
@@ -1,4 +1,11 @@
 #!/bin/bash
+if [[ "$1" == '--help' || "$1" == '-h' ]]
+then
+	echo "Usage: parent-urls [--with-original]" >&2
+	echo "Take URLs on stdin, remove path components one by one and print the resulting URLs on stdout." >&2
+	echo "If --with-original is given, the input URL is printed before the parents." >&2
+fi
+
 prog0='BEGIN { FS="/"; OFS="/" }' # Set the field separators
 prog1='{ print }' # Print the input URL (if desired)
 prog2='/\/$/ { --NF }' # Remove the trailing blank field if the URL ends with a slash