diff --git a/phpBB/styles/prosilver/template/viewtopic_topic_tools.html b/phpBB/styles/prosilver/template/viewtopic_topic_tools.html
index 272a434f6a..78dbae2dd4 100644
--- a/phpBB/styles/prosilver/template/viewtopic_topic_tools.html
+++ b/phpBB/styles/prosilver/template/viewtopic_topic_tools.html
@@ -8,13 +8,13 @@
 			<div class="pointer"><div class="pointer-inner"></div></div>
 			<ul class="dropdown-contents">
 				<!-- EVENT viewtopic_topic_tools_before -->
-				<!-- IF U_WATCH_TOPIC -->
+				{% if U_WATCH_TOPIC %}
 					<li>
-						<a href="{U_WATCH_TOPIC}" class="watch-topic-link" title="{S_WATCH_TOPIC_TITLE}" data-ajax="toggle_link" data-toggle-class="icon <!-- IF S_WATCHING_TOPIC -->fa-check-square-o<!-- ELSE -->fa-square-o<!-- ENDIF --> fa-fw" data-toggle-text="{S_WATCH_TOPIC_TOGGLE}" data-toggle-url="{U_WATCH_TOPIC_TOGGLE}" data-update-all=".watch-topic-link">
-							<i class="icon <!-- IF S_WATCHING_TOPIC -->fa-square-o<!-- ELSE -->fa-check-square-o<!-- ENDIF --> fa-fw" aria-hidden="true"></i><span>{S_WATCH_TOPIC_TITLE}</span>
+						<a href="{{ U_WATCH_TOPIC }}" class="watch-topic-link" title="{{ S_WATCH_TOPIC_TITLE }}" data-ajax="toggle_link" data-toggle-class="icon fa-{{ !S_WATCHING_TOPIC ? 'check-' }}square-o fa-fw" data-toggle-text="{{ S_WATCH_TOPIC_TOGGLE }}" data-toggle-url="{{ U_WATCH_TOPIC_TOGGLE }}" data-update-all=".watch-topic-link">
+							<i class="icon fa-{{ S_WATCHING_TOPIC ? 'check-' }}square-o fa-fw" aria-hidden="true"></i><span>{{ S_WATCH_TOPIC_TITLE }}</span>
 						</a>
 					</li>
-				<!-- ENDIF -->
+				{% endif %}
 				<!-- IF U_BOOKMARK_TOPIC -->
 					<li>
 						<a href="{U_BOOKMARK_TOPIC}" class="bookmark-link" title="{L_BOOKMARK_TOPIC}" data-ajax="alt_text" data-alt-text="{S_BOOKMARK_TOGGLE}" data-update-all=".bookmark-link">