diff --git a/css/screen.css b/css/screen.css
index cf077ec4..4d095eae 100644
--- a/css/screen.css
+++ b/css/screen.css
@@ -30,7 +30,7 @@
 
 #Form_EditForm #Title .update { margin-left: 7px; }
 
-.cms .AssetAdmin .cms-content-fields { /** DEPRECATED: .cms-content-tools will be removed in 4.0 Use .cms-content-filters instead. */ }
+.cms .AssetAdmin .cms-content-fields { overflow-x: hidden; /** DEPRECATED: .cms-content-tools will be removed in 4.0 Use .cms-content-filters instead. */ }
 .cms .AssetAdmin .cms-content-fields .cms-edit-form.AssetAdmin { width: 100%; overflow-y: auto; }
 .cms .AssetAdmin .cms-content-fields .cms-content-tools .cms-panel-content { overflow: hidden; }
 .cms .AssetAdmin .cms-content-fields .cms-content-tools .cms-panel-content .cms-search-form { height: 100%; }
diff --git a/scss/_AssetAdmin.scss b/scss/_AssetAdmin.scss
index a01931fa..bdfd73bd 100644
--- a/scss/_AssetAdmin.scss
+++ b/scss/_AssetAdmin.scss
@@ -1,5 +1,7 @@
 .cms .AssetAdmin {
 	.cms-content-fields {
+		overflow-x: hidden; //hides 'allowed extensions' sidebar
+		
 		.cms-edit-form.AssetAdmin {
 			width: 100%;
 			overflow-y:auto; //adds scrolling only to the datagrid