diff --git a/docs/documentation/components/level.html b/docs/documentation/components/level.html
index b9ee7899..dd3b3b02 100644
--- a/docs/documentation/components/level.html
+++ b/docs/documentation/components/level.html
@@ -19,7 +19,7 @@ doc-subtab: level
         <li>
           <code>level</code>: main container
           <ul>
-            <li><code>level-left</code> for the left side</li>
+            <li><code>level-left</code> for the left side. This element is <em>required</em>, even if it is empty</li>
             <li>
               <code>level-right</code> for the right side
               <ul>