diff --git a/app/views/wiki/diff.html.erb b/app/views/wiki/diff.html.erb
index c1062924c..ef26c570c 100644
--- a/app/views/wiki/diff.html.erb
+++ b/app/views/wiki/diff.html.erb
@@ -22,6 +22,6 @@
       %>, <%= format_time(@diff.content_to.updated_on) %>)</em>
 </p>
 
-<div class="text-diff">
+<div class="text-diff" style=" width: 100%;word-break: break-all;">
 <%= simple_format_without_paragraph @diff.to_html %>
 </div>