diff --git a/normalize.css b/normalize.css
index 6b566e1..8bc13f4 100644
--- a/normalize.css
+++ b/normalize.css
@@ -92,10 +92,6 @@ audio {
 	display: none;
 }
 
-audio[controls] {
-	_display: expression(this.controls ? 'inline' : 'none');
-}
-
 /*
  * 1.
  * Disable border for <img> element
@@ -119,10 +115,6 @@ abbr[title] {
 	border-bottom: 1px dotted;
 }
 
-abbr {
-	_border-bottom: expression(this.title ? '1px dotted' : 'none');
-}
-
 /*
  * Add italic font style to <dfn> element
  * Fixes styling not present in C10 S5