diff --git a/docs/UsersManual.html b/docs/UsersManual.html
index e7ea133..f6651b1 100644
--- a/docs/UsersManual.html
+++ b/docs/UsersManual.html
@@ -189,6 +189,10 @@
 <p><b>-pedantic-errors</b>: Error on language extensions.</p>
 <p><b>-Wsystem-headers</b>: Enable warnings from system headers.</p>
 
+<p><b>-ferror-limit=123</b>: Stop emitting diagnostics after 123 errors have
+   been produced.  The default is 20, and the error limit can be disabled with
+   -ferror-limit=0.</p>
+
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 <h4 id="cl_diag_formatting">Formatting of Diagnostics</h4>
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