diff --git a/templates/comment.tmpl b/templates/comment.tmpl
index c16ca7c81..e2924407b 100644
--- a/templates/comment.tmpl
+++ b/templates/comment.tmpl
@@ -22,12 +22,12 @@
 Comment by
 <TMPL_IF COMMENTOPENID>
 <span class="author" title="OpenID">
-<a href="<TMPL_VAR COMMENTOPENID>"><TMPL_VAR COMMENTAUTHOR></a>
+<a rel="nofollow" href="<TMPL_VAR COMMENTOPENID>"><TMPL_VAR COMMENTAUTHOR></a>
 </span>
 <TMPL_ELSE>
 <span class="author" title="Signed in">
 <TMPL_IF COMMENTAUTHORURL>
-<a href="<TMPL_VAR COMMENTAUTHORURL>"><TMPL_VAR COMMENTAUTHOR></a>
+<a rel="nofollow" href="<TMPL_VAR COMMENTAUTHORURL>"><TMPL_VAR COMMENTAUTHOR></a>
 <TMPL_ELSE>
 <TMPL_VAR COMMENTAUTHOR>
 </TMPL_IF>
@@ -42,7 +42,7 @@ Comment by
 <span class="author" title="Unauthenticated, from unknown IP address">
 </TMPL_IF>
 <TMPL_IF AUTHORURL>
-<a href="<TMPL_VAR AUTHORURL>"><TMPL_VAR AUTHOR></a>
+<a rel="nofollow" href="<TMPL_VAR AUTHORURL>"><TMPL_VAR AUTHOR></a>
 <TMPL_ELSE>
 <TMPL_VAR AUTHOR>
 </TMPL_IF>