diff --git a/phpBB/styles/prosilver/template/overall_header.html b/phpBB/styles/prosilver/template/overall_header.html
index cb1283cab4..54a38ee8e6 100644
--- a/phpBB/styles/prosilver/template/overall_header.html
+++ b/phpBB/styles/prosilver/template/overall_header.html
@@ -49,10 +49,6 @@
 <link href="{T_STYLESHEET_LINK}" rel="stylesheet">
 <link href="{T_STYLESHEET_LANG_LINK}" rel="stylesheet">
 
-<!-- IF S_CONTENT_DIRECTION eq 'rtl' -->
-	<link href="{T_THEME_PATH}/bidi.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet">
-<!-- ENDIF -->
-
 <!-- IF S_PLUPLOAD -->
 	<link href="{T_THEME_PATH}/plupload.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet">
 <!-- ENDIF -->
diff --git a/phpBB/styles/prosilver/template/simple_header.html b/phpBB/styles/prosilver/template/simple_header.html
index d7a6e050e9..5543ea0e03 100644
--- a/phpBB/styles/prosilver/template/simple_header.html
+++ b/phpBB/styles/prosilver/template/simple_header.html
@@ -27,10 +27,6 @@
 <link href="{T_STYLESHEET_LINK}" rel="stylesheet">
 <link href="{T_STYLESHEET_LANG_LINK}" rel="stylesheet">
 
-<!-- IF S_CONTENT_DIRECTION eq 'rtl' -->
-	<link href="{T_THEME_PATH}/bidi.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet">
-<!-- ENDIF -->
-
 <!-- DEFINE $POPUP = 1 -->
 
 <!-- EVENT simple_header_head_append -->
diff --git a/phpBB/styles/prosilver/theme/stylesheet.css b/phpBB/styles/prosilver/theme/stylesheet.css
index 0da29846db..0e582663c6 100644
--- a/phpBB/styles/prosilver/theme/stylesheet.css
+++ b/phpBB/styles/prosilver/theme/stylesheet.css
@@ -1,6 +1,6 @@
 /*  phpBB3 Style Sheet
     --------------------------------------------------------------
-	Style name:			prosilver (the default phpBB 3.2.x style)
+	Style name:			prosilver (the default phpBB 3.3.x style)
 	Based on style:
 	Original author:	Tom Beddard ( http://www.subblue.com/ )
 	Modified by:		phpBB Limited ( https://www.phpbb.com/ )
@@ -19,4 +19,5 @@
 @import url("icons.css?v=3.3");
 @import url("colours.css?v=3.3");
 @import url("responsive.css?v=3.3");
+@import url("bidi.css?v=3.3");
 @import url("tweaks.css?v=3.3");