diff --git a/framework/core/less/lib/FormControl.less b/framework/core/less/lib/FormControl.less
index 66c09f2ac..73c562c2e 100755
--- a/framework/core/less/lib/FormControl.less
+++ b/framework/core/less/lib/FormControl.less
@@ -27,8 +27,7 @@
   &[disabled],
   &[readonly],
   fieldset[disabled] & {
-    // background-color: @input-bg-disabled;
-    opacity: 1; // iOS fix for unreadable disabled content; see https://github.com/twbs/bootstrap/issues/11655
+    opacity: 0.5;
   }
 
   &[disabled],