diff --git a/libs/file-icons.css b/libs/file-icons.css
index 914ce07e0a445d1fda8e1456284a8b37cd34e975..d8fe686abfa38d12ce024025f09b70d9a9e739fa 100644
--- a/libs/file-icons.css
+++ b/libs/file-icons.css
@@ -134,7 +134,7 @@
 
 /* ----------------------------[ Icons ]---------------------------------- */
 
-.icon:before{
+.octotree_oschina_sidebar .icon:before{
 	font-weight: normal;
 	font-style: normal;
 	text-align: center;