diff --git a/package/db-tool/database.sh b/package/db-tool/database.sh
index 0fd881e..529c983 100644
--- a/package/db-tool/database.sh
+++ b/package/db-tool/database.sh
@@ -1529,7 +1529,7 @@ if ! [ "${AS_LIBRARY+x}" ]; then
 
   parsed_uri=$(mktemp)
   trap 'rm -rf "$parsed_uri"' EXIT INT HUP
-  parse-uri "$PGURL" > "$parsed_uri"
+  parse-uri "${PGURL:-}" > "$parsed_uri"
   # shellcheck disable=SC1090
   . "$parsed_uri"