diff --git a/shell-command.sh b/shell-command.sh
index c6388ba..3963a16 100755
--- a/shell-command.sh
+++ b/shell-command.sh
@@ -13,12 +13,13 @@
 set -euo pipefail
 [ "${SCRIPT_DEBUG-}" = "1" ] && set -x
 
-# URL endpoint to fetch the data from.
-URL_ENDPOINT="${JOKE_URL_ENDPOINT:-https://official-joke-api.appspot.com/jokes/<<TOKEN>>/random}"
 
 # Topic.
 topic="${1-}"
 
+# URL endpoint to fetch the data from.
+URL_ENDPOINT="${JOKE_URL_ENDPOINT:-https://official-joke-api.appspot.com/jokes/<<TOKEN>>/random}"
+
 # Flag to bypass the prompt to proceed.
 SHOULD_PROCEED="${SHOULD_PROCEED-}"