diff --git a/core/css/jquery.ocdialog.scss b/core/css/jquery.ocdialog.scss
index fa2d9772658c6c836769089e32fcd32b3c950de9..a6ee3c6c57db8136823dc80773d9b61d16f4b512 100644
--- a/core/css/jquery.ocdialog.scss
+++ b/core/css/jquery.ocdialog.scss
@@ -29,7 +29,7 @@
 	padding-bottom: 0;
 	box-sizing: border-box;
 	width: 100%;
-	background-image: linear-gradient(transparent, $color-main-background);
+	background-image: linear-gradient(rgba(255, 255, 255, 0.0), $color-main-background);
 	border-bottom-left-radius: 3px;
 	border-bottom-right-radius: 3px;
 }