diff --git a/phpBB/adm/style/admin.css b/phpBB/adm/style/admin.css
index 50d55cad17..f9d5c8257f 100644
--- a/phpBB/adm/style/admin.css
+++ b/phpBB/adm/style/admin.css
@@ -1686,7 +1686,6 @@ fieldset.submit-buttons legend {
 		0 1px 5px 0 rgba(0, 0, 0, 0.12);
 	position: absolute;
 	z-index: 999;
-	top: 20px;
 	overflow: auto;
 	transition: all 0.2s ease;
 }
diff --git a/phpBB/styles/prosilver/theme/mentions.css b/phpBB/styles/prosilver/theme/mentions.css
index 32c77b196c..262e83eecf 100644
--- a/phpBB/styles/prosilver/theme/mentions.css
+++ b/phpBB/styles/prosilver/theme/mentions.css
@@ -18,7 +18,6 @@
 	border-radius: 2px;
 	position: absolute;
 	z-index: 999;
-	top: 20px;
 	overflow: auto;
 	transition: all 0.2s ease;
 }