1 files changed, 2 insertions, 0 deletions

diff --git a/diff1.awk b/diff1.awk
index e5e8fea..cb86e00 100644
--- a/diff1.awk
+++ b/diff1.awk
@@ -1,3 +1,5 @@
+#!/usr/bin/awk -f
+
 ### diff.awk
 # numerical diff along columns