diff --git a/phpBB/styles/prosilver/template/posting_editor.html b/phpBB/styles/prosilver/template/posting_editor.html
index 8cd5fc60d5..adde3411e6 100644
--- a/phpBB/styles/prosilver/template/posting_editor.html
+++ b/phpBB/styles/prosilver/template/posting_editor.html
@@ -88,9 +88,9 @@
 	<!-- ENDIF -->
 
 	<!-- IF not S_PRIVMSGS and S_DISPLAY_USERNAME -->
-	<dl>
+	<dl style="clear: left;">
 		<dt><label for="username">{L_USERNAME}:</label></dt>
-		<dd><input type="text" tabindex="1" name="username" id="username" size="25" value="{USERNAME}" class="inputbox" /></dd>
+		<dd><input type="text" tabindex="1" name="username" id="username" size="25" value="{USERNAME}" class="inputbox autowidth" /></dd>
 	</dl>
 	<!-- ENDIF -->