diff --git a/src/less/base/pane.less b/src/less/base/pane.less
index ed0194c8a..fa9dcf2fc 100644
--- a/src/less/base/pane.less
+++ b/src/less/base/pane.less
@@ -2,4 +2,5 @@
 
 .bi-pane {
   min-height: 25px;
+  .background-color(@color-bi-background-normal, 0);
 }
\ No newline at end of file