diff --git a/src/define.sh b/src/define.sh
index 04689af..ea2ffb5 100644
--- a/src/define.sh
+++ b/src/define.sh
@@ -2,6 +2,7 @@
 set -Eeuo pipefail
 
 : "${VERIFY:=""}"
+: "${REGION:=""}"
 : "${MANUAL:=""}"
 : "${REMOVE:=""}"
 : "${VERSION:=""}"