diff --git a/phpBB/styles/prosilver/theme/bidi.css b/phpBB/styles/prosilver/theme/bidi.css
index a6d4bef6f4..f09493ab3b 100644
--- a/phpBB/styles/prosilver/theme/bidi.css
+++ b/phpBB/styles/prosilver/theme/bidi.css
@@ -922,6 +922,7 @@ li.breadcrumbs span:first-child > a {
 
 .rtl .search-header .button-search-end {
 	border: 0;
+	border-radius: 4px 0 0 4px;
 }
 
 .rtl .search-header {