diff --git a/cowpatch.sh b/cowpatch.sh
index c79c9d9..bacabbd 100755
--- a/cowpatch.sh
+++ b/cowpatch.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -x
 #
 # cowpatch.sh, by Rich Felker
 #