diff --git a/guide/english/css/background-opacity/index.md b/guide/english/css/background-opacity/index.md
index 8c20f8a75e..04fd0a32b5 100644
--- a/guide/english/css/background-opacity/index.md
+++ b/guide/english/css/background-opacity/index.md
@@ -52,7 +52,7 @@ Alternatively you can use a transparent rgba value like this:
 
 .class-name{
   background-color: rgba(0,0,0,.5);
-  }
+}
  ```
 The example above sets the background to be black with 50% opacity. The last value of an rgba value is the alpha value. An alpha value of 1 equals 100%, and 0.5 (.5 for short) equals 50%. We use this method to add transparency to an element without affecting the content inside.