diff --git a/d07/part1.sed b/d07/part1.sed
old mode 100644
new mode 100755
index e241438..e4bea37
--- a/d07/part1.sed
+++ b/d07/part1.sed
@@ -1,3 +1,5 @@
+#!/usr/bin/sed -Enf
+
 # Start the beam going
 s/S/|/; h