diff --git a/libwebsockets-api-doc.html b/libwebsockets-api-doc.html
index fb14ef0..9ccf859 100644
--- a/libwebsockets-api-doc.html
+++ b/libwebsockets-api-doc.html
@@ -977,7 +977,7 @@
 memory for the use of the extension, a pointer
 to it comes in the <tt><b>user</b></tt> callback parameter
 <dt><b>per_context_private_data</b>
-<dd>Optional storage for this externsion that
+<dd>Optional storage for this extension that
 is per-context, so it can track stuff across
 all sessions, etc, if it wants
 </dl>