diff --git a/phpBB/styles/prosilver/template/posting_attach_body.html b/phpBB/styles/prosilver/template/posting_attach_body.html
index 4ad66656b2..81b2c2bf41 100644
--- a/phpBB/styles/prosilver/template/posting_attach_body.html
+++ b/phpBB/styles/prosilver/template/posting_attach_body.html
@@ -23,7 +23,7 @@
 
 	<div class="panel<!-- IF not .attach_row --> hidden<!-- ENDIF -->" id="file-list-container">
 		<div class="inner">
-			<table class="table1 zebra-list">
+			<table class="table1 zebra-list fixed-width-table">
 				<thead>
 					<tr>
 						<th class="attach-name">{L_PLUPLOAD_FILENAME}</th>
diff --git a/phpBB/styles/prosilver/theme/content.css b/phpBB/styles/prosilver/theme/content.css
index 7cc70b75d3..0a0e853db2 100644
--- a/phpBB/styles/prosilver/theme/content.css
+++ b/phpBB/styles/prosilver/theme/content.css
@@ -803,6 +803,10 @@ div.dl_links {
 	white-space: nowrap;
 }
 
+table.fixed-width-table {
+	table-layout: fixed;
+}
+
 /* Show scrollbars for items with overflow on iOS devices
 ----------------------------------------*/
 .postbody .content::-webkit-scrollbar, #topicreview::-webkit-scrollbar, #post_details::-webkit-scrollbar, .codebox code::-webkit-scrollbar, .attachbox dd::-webkit-scrollbar, .attach-image::-webkit-scrollbar, .dropdown-extended ul::-webkit-scrollbar {