diff --git a/boring-nginx/ngxproxy b/boring-nginx/ngxproxy
index fa55909..33ebea2 100644
--- a/boring-nginx/ngxproxy
+++ b/boring-nginx/ngxproxy
@@ -15,7 +15,7 @@ done
 
 while [ "$CONTAINER" == "" ]; do
     read -p "Container: " CONTAINER
-    ping -c 1 CONTAINER
+    ping -c 1 ${CONTAINER}
     if [ "$?" != "0" ]; then
         echo "WARNING: ${CONTAINER} seems to be unavailable."
     fi