diff --git a/scripts/yt-api-helper.sh b/scripts/yt-api-helper.sh
index ce4b7de..4dd6811 100755
--- a/scripts/yt-api-helper.sh
+++ b/scripts/yt-api-helper.sh
@@ -404,7 +404,7 @@ hdr_ct='Content-Type: application/json; charset=utf-8'
 hdr_ua='User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Firefox/78.0'
 
 # Default to STDOUT if no output file was given
-if [ -z "output" ]; then output='-'; fi
+if [ -z "$output" ]; then output='-'; fi
 
 # Run!
 curl --compressed -o "$output" -H "$hdr_ct" -H "$hdr_ua" --data "$data" "$url"