diff --git a/mozilla/layout/html/document/src/forms.css b/mozilla/layout/html/document/src/forms.css
index c2ea587900a..2d544b287c6 100644
--- a/mozilla/layout/html/document/src/forms.css
+++ b/mozilla/layout/html/document/src/forms.css
@@ -236,8 +236,7 @@ input[disabled],
 textarea[disabled],
 option[disabled],
 optgroup[disabled],
-select[disabled],
-select[disabled]:-moz-display-comboboxcontrol-frame {
+select[disabled] {
   color: GrayText;
   background-color: ThreeDFace;
   cursor: default;
diff --git a/mozilla/layout/style/forms.css b/mozilla/layout/style/forms.css
index c2ea587900a..2d544b287c6 100644
--- a/mozilla/layout/style/forms.css
+++ b/mozilla/layout/style/forms.css
@@ -236,8 +236,7 @@ input[disabled],
 textarea[disabled],
 option[disabled],
 optgroup[disabled],
-select[disabled],
-select[disabled]:-moz-display-comboboxcontrol-frame {
+select[disabled] {
   color: GrayText;
   background-color: ThreeDFace;
   cursor: default;