diff --git a/doc/go_mem.html b/doc/go_mem.html
index a388283588c..45ee0f53f2b 100644
--- a/doc/go_mem.html
+++ b/doc/go_mem.html
@@ -54,7 +54,7 @@ if both of the following hold:
 </p>
 
 <ol>
-<li><span class="event">w</span> happens before <span class="event">r</span>.</li>
+<li><span class="event">r</span> does not happen before <span class="event">w</span>.</li>
 <li>There is no other write <span class="event">w'</span> to <code>v</code> that happens
     after <span class="event">w</span> but before <span class="event">r</span>.</li>
 </ol>