diff --git a/would-reformat.sh b/would-reformat.sh
index 12c9aee..c03e457 100755
--- a/would-reformat.sh
+++ b/would-reformat.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -uo pipefail
+set -euo pipefail
 IFS=$'\n\t'
 
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"