diff --git a/nginx_build_script/README.md b/nginx_build_script/README.md
index 10535b5..a43b5e3 100644
--- a/nginx_build_script/README.md
+++ b/nginx_build_script/README.md
@@ -36,11 +36,23 @@ while [ ${#} -gt 0 ]; do
                     ;;
             esac
             ;;
+        --nginx-tag=* )
+            NGINX_TAG="${1#*=}"             # Specify Nginx Mercurial Tag
+            case $NGINX_TAG in
+                "")
+                    echo "ERROR: --nginx-tag= is empty!"
+                    exit 1
+                    ;;
+                *)
+                    ;;
+            esac
+            ;;
         *)
             ;;
     esac
     shift
 done
+
 ```
 
 #### Note :  
diff --git a/nginx_build_script/build.sh b/nginx_build_script/build.sh
index b9da7f1..8f71eb7 100644
--- a/nginx_build_script/build.sh
+++ b/nginx_build_script/build.sh
@@ -22,7 +22,7 @@ while [ ${#} -gt 0 ]; do
             esac
             ;;
         --nginx-tag=* )
-            NGINX_TAG="${1#*=}"
+            NGINX_TAG="${1#*=}"             # Specify Nginx Mercurial Tag
             case $NGINX_TAG in
                 "")
                     echo "ERROR: --nginx-tag= is empty!"