diff --git a/core/scss/bootstrap/_dropdown.scss b/core/scss/bootstrap/_dropdown.scss
index 352dce3eb..95463a89f 100644
--- a/core/scss/bootstrap/_dropdown.scss
+++ b/core/scss/bootstrap/_dropdown.scss
@@ -62,7 +62,6 @@
   list-style: none;
   background-color: var(--dropdown-bg);
   background-clip: padding-box;
-  border: var(--dropdown-border-width) solid var(--dropdown-border-color);
   @include border-radius(var(--dropdown-border-radius));
   @include box-shadow(var(--dropdown-box-shadow));