diff --git a/src/Orchard.Web/Modules/Orchard.Media/Styles/orchard-media-admin.css b/src/Orchard.Web/Modules/Orchard.Media/Styles/orchard-media-admin.css
index 353fa9a3b..5afaf4635 100644
--- a/src/Orchard.Web/Modules/Orchard.Media/Styles/orchard-media-admin.css
+++ b/src/Orchard.Web/Modules/Orchard.Media/Styles/orchard-media-admin.css
@@ -5,4 +5,8 @@
 .folderProperties {
     float:right;
     margin:-5em 0 0;
+}
+.previewImage {
+    max-height:640px;
+    max-width:640px;
 }
\ No newline at end of file