diff --git a/zip-0221.html b/zip-0221.html
index bfa29126..f04036e0 100644
--- a/zip-0221.html
+++ b/zip-0221.html
@@ -305,7 +305,7 @@ License: MIT</pre>
                     <li><code>nEarliestHeight</code>
                         <dl>
                             <dt>Leaf node</dt>
-                            <dd>The header's height.</dd>
+                            <dd>The height of the block.</dd>
                             <dt>Internal or root node</dt>
                             <dd>Inherited from the left child.</dd>
                         </dl>
@@ -314,7 +314,7 @@ License: MIT</pre>
                     <li><code>nLatestHeight</code>
                         <dl>
                             <dt>Leaf node</dt>
-                            <dd>The header's height.</dd>
+                            <dd>The height of the block.</dd>
                             <dt>Internal or root node</dt>
                             <dd>Inherited from the right child.</dd>
                         </dl>
diff --git a/zip-0221.rst b/zip-0221.rst
index c24d3e60..acd1e77f 100644
--- a/zip-0221.rst
+++ b/zip-0221.rst
@@ -300,7 +300,7 @@ Each MMR node is defined as follows:
 9. ``nEarliestHeight``
 
    Leaf node
-     The header's height.
+     The height of the block.
 
    Internal or root node
      Inherited from the left child.
@@ -310,7 +310,7 @@ Each MMR node is defined as follows:
 10. ``nLatestHeight``
 
     Leaf node
-      The header's height.
+      The height of the block.
 
     Internal or root node
       Inherited from the right child.