diff --git a/phpBB/styles/prosilver/template/mcp_post.html b/phpBB/styles/prosilver/template/mcp_post.html
index d679fd1598..10ec6f3ea9 100644
--- a/phpBB/styles/prosilver/template/mcp_post.html
+++ b/phpBB/styles/prosilver/template/mcp_post.html
@@ -52,7 +52,7 @@
 
 		<ul class="post-buttons">
 			<li id="expand">
-				<a href="#post_details" onclick="viewableArea(getElementById('post_details'), true); var rev_text = getElementById('expand').getElementsByTagName('a').item(0).firstChild; if (rev_text.data == '{LA_EXPAND_VIEW}'){rev_text.data = '{LA_COLLAPSE_VIEW}'; } else if (rev_text.data == '{LA_COLLAPSE_VIEW}'){rev_text.data = '{LA_EXPAND_VIEW}'}; return false;">
+				<a href="#post_details" onclick="viewableArea(getElementById('post_details'), true); var rev_text = getElementById('expand').getElementsByTagName('a').item(0).firstChild; if (rev_text.data.trim() == '{LA_EXPAND_VIEW}'){rev_text.data = '{LA_COLLAPSE_VIEW}'; } else if (rev_text.data.trim() == '{LA_COLLAPSE_VIEW}'){rev_text.data = '{LA_EXPAND_VIEW}';} return false;">
 					{L_EXPAND_VIEW}
 				</a>
 			</li>