diff --git a/ct/postgresql.sh b/ct/postgresql.sh
index d87cab934..90f54558b 100644
--- a/ct/postgresql.sh
+++ b/ct/postgresql.sh
@@ -23,7 +23,7 @@ function update_script() {
     header_info
     check_container_storage
     check_container_resources
-    if [[ ! -f /etc/apt/sources.list.d/pgdg.list ]]; then
+    if ! command -v psql >/dev/null 2>&1; then
         msg_error "No ${APP} Installation Found!"
         exit
     fi