diff --git a/lib/codemirror.css b/lib/codemirror.css
index b008351a62319f1b5cb9180e42977206e0bea492..f4d3c5f40b778503ee03d305e5395ddcc486d5c6 100644
--- a/lib/codemirror.css
+++ b/lib/codemirror.css
@@ -319,8 +319,8 @@ div.CodeMirror-dragcursors {
 .CodeMirror-line::-moz-selection, .CodeMirror-line > span::-moz-selection, .CodeMirror-line > span > span::-moz-selection { background: #d7d4f0; }
 
 .cm-searching {
-  background: #ffa;
-  background: rgba(255, 255, 0, .4);
+  background-color: #ffa;
+  background-color: rgba(255, 255, 0, .4);
 }
 
 /* Used to force a border model for a node */