diff --git a/app/assets/stylesheets/css3/_inline-block.scss b/app/assets/stylesheets/css3/_inline-block.scss
index b8c839a91..3272a0010 100644
--- a/app/assets/stylesheets/css3/_inline-block.scss
+++ b/app/assets/stylesheets/css3/_inline-block.scss
@@ -1,6 +1,5 @@
 // Legacy support for inline-block in IE7 (maybe IE6)
 @mixin inline-block {
-  -moz-box-orient: vertical;
   display: inline-block;
   vertical-align: baseline;
   zoom: 1;