diff --git a/phpBB/styles/prosilver/template/overall_header.html b/phpBB/styles/prosilver/template/overall_header.html
index e537aabf56..009b514e52 100644
--- a/phpBB/styles/prosilver/template/overall_header.html
+++ b/phpBB/styles/prosilver/template/overall_header.html
@@ -46,12 +46,9 @@
 	var onload_functions = new Array();
 	var onunload_functions = new Array();
 
-	<!-- IF S_USER_PM_POPUP -->
-		if ({S_NEW_PM})
-		{
-			var url = '{UA_POPUP_PM}';
-			window.open(url.replace(/&amp;/g, '&'), '_phpbbprivmsg', 'height=225,resizable=yes,scrollbars=yes, width=400');
-		}
+	<!-- IF S_USER_PM_POPUP and S_NEW_PM -->
+		var url = '{UA_POPUP_PM}';
+		window.open(url.replace(/&amp;/g, '&'), '_phpbbprivmsg', 'height=225,resizable=yes,scrollbars=yes, width=400');
 	<!-- ENDIF -->
 
 	/**
diff --git a/phpBB/styles/subsilver2/template/overall_header.html b/phpBB/styles/subsilver2/template/overall_header.html
index 48f6202c4f..be4c7b5b4c 100644
--- a/phpBB/styles/subsilver2/template/overall_header.html
+++ b/phpBB/styles/subsilver2/template/overall_header.html
@@ -28,11 +28,8 @@
 
 <script type="text/javascript">
 // <![CDATA[
-<!-- IF S_USER_PM_POPUP -->
-	if ({S_NEW_PM})
-	{
-		popup('{UA_POPUP_PM}', 400, 225, '_phpbbprivmsg');
-	}
+<!-- IF S_USER_PM_POPUP and S_NEW_PM -->
+	popup('{UA_POPUP_PM}', 400, 225, '_phpbbprivmsg');
 <!-- ENDIF -->
 
 function popup(url, width, height, name)