diff --git a/less/dropdowns.less b/less/dropdowns.less
index f47a4bce8b..d2a872d8c4 100644
--- a/less/dropdowns.less
+++ b/less/dropdowns.less
@@ -11,7 +11,7 @@
   margin-left: 2px;
   vertical-align: middle;
   border-top:   @caret-width-base dashed;
-  border-top:   @caret-width-base ~"solid\9"; // IE8
+  border-top:   @caret-width-base solid ~"\9"; // IE8
   border-right: @caret-width-base solid transparent;
   border-left:  @caret-width-base solid transparent;
 }