diff --git a/less/forms.less b/less/forms.less
index de1508d0cd..94c0e7fcef 100644
--- a/less/forms.less
+++ b/less/forms.less
@@ -400,12 +400,14 @@ input[type="checkbox"] {
   text-align: center;
   pointer-events: none;
 }
-.input-lg + .form-control-feedback {
+.input-lg + .form-control-feedback,
+.input-group-lg + .form-control-feedback {
   width: @input-height-large;
   height: @input-height-large;
   line-height: @input-height-large;
 }
-.input-sm + .form-control-feedback {
+.input-sm + .form-control-feedback,
+.input-group-sm + .form-control-feedback {
   width: @input-height-small;
   height: @input-height-small;
   line-height: @input-height-small;