diff --git a/phpBB/styles/prosilver/template/ucp_pm_viewmessage.html b/phpBB/styles/prosilver/template/ucp_pm_viewmessage.html
index 6cb38c0a73..230759aa9e 100644
--- a/phpBB/styles/prosilver/template/ucp_pm_viewmessage.html
+++ b/phpBB/styles/prosilver/template/ucp_pm_viewmessage.html
@@ -9,14 +9,14 @@
 <!-- IF S_DISPLAY_HISTORY and (U_VIEW_PREVIOUS_HISTORY or U_VIEW_NEXT_HISTORY) -->
 	<fieldset class="display-options clearfix">
 		<!-- IF U_VIEW_PREVIOUS_HISTORY -->
-		<a href="{U_VIEW_PREVIOUS_HISTORY}" class="left-box arrow-{S_CONTENT_FLOW_BEGIN}">
-			<i class="icon fa-angle-{S_CONTENT_FLOW_BEGIN} fa-fw icon-black"></i><span>{L_VIEW_PREVIOUS_HISTORY}</span>
-		</a>
+			<a href="{U_VIEW_PREVIOUS_HISTORY}" class="left-box arrow-{S_CONTENT_FLOW_BEGIN}">
+				<i class="icon fa-angle-{S_CONTENT_FLOW_BEGIN} fa-fw icon-black"></i><span>{L_VIEW_PREVIOUS_HISTORY}</span>
+			</a>
 		<!-- ENDIF -->
 		<!-- IF U_VIEW_NEXT_HISTORY -->
-		<a href="{U_VIEW_NEXT_HISTORY}" class="right-box arrow-{S_CONTENT_FLOW_END}">
-			<i class="icon fa-angle-{S_CONTENT_FLOW_BEGIN} fa-fw icon-black"></i><span>{L_VIEW_NEXT_HISTORY}</span>
-		</a>
+			<a href="{U_VIEW_NEXT_HISTORY}" class="right-box arrow-{S_CONTENT_FLOW_END}">
+				<i class="icon fa-angle-{S_CONTENT_FLOW_BEGIN} fa-fw icon-black"></i><span>{L_VIEW_NEXT_HISTORY}</span>
+			</a>
 		<!-- ENDIF -->
 	</fieldset>
 <!-- ENDIF -->