diff --git a/packages/clay-css/src/scss/cadmin/variables/_management-bar.scss b/packages/clay-css/src/scss/cadmin/variables/_management-bar.scss
index b4b1bf16e7..8bdd2fe2b9 100644
--- a/packages/clay-css/src/scss/cadmin/variables/_management-bar.scss
+++ b/packages/clay-css/src/scss/cadmin/variables/_management-bar.scss
@@ -1,6 +1,8 @@
 $cadmin-management-bar-base: () !default;
 $cadmin-management-bar-base: map-deep-merge(
 	(
+		border-color: transparent,
+		border-style: solid,
 		navbar-nav: (
 			nav-link: (
 				border-radius: $cadmin-border-radius,
diff --git a/packages/clay-css/src/scss/cadmin/variables/_navigation-bar.scss b/packages/clay-css/src/scss/cadmin/variables/_navigation-bar.scss
index 6e94495289..649331cf57 100644
--- a/packages/clay-css/src/scss/cadmin/variables/_navigation-bar.scss
+++ b/packages/clay-css/src/scss/cadmin/variables/_navigation-bar.scss
@@ -24,6 +24,8 @@ $cadmin-navigation-bar-size: map-deep-merge(
 $cadmin-navigation-bar-base: () !default;
 $cadmin-navigation-bar-base: map-deep-merge(
 	(
+		border-color: transparent,
+		border-style: solid,
 		navbar-nav: (
 			nav-link: (
 				border-radius: 0,
diff --git a/packages/clay-css/src/scss/variables/_management-bar.scss b/packages/clay-css/src/scss/variables/_management-bar.scss
index 7947b50dd7..8058c2d3ed 100644
--- a/packages/clay-css/src/scss/variables/_management-bar.scss
+++ b/packages/clay-css/src/scss/variables/_management-bar.scss
@@ -1,4 +1,11 @@
 $management-bar-base: () !default;
+$management-bar-base: map-deep-merge(
+	(
+		border-color: transparent,
+		border-style: solid,
+	),
+	$management-bar-base
+);
 
 $management-bar-size: () !default;
 $management-bar-size: map-deep-merge(
diff --git a/packages/clay-css/src/scss/variables/_navigation-bar.scss b/packages/clay-css/src/scss/variables/_navigation-bar.scss
index 21d4dd9116..bd054173d1 100644
--- a/packages/clay-css/src/scss/variables/_navigation-bar.scss
+++ b/packages/clay-css/src/scss/variables/_navigation-bar.scss
@@ -17,6 +17,13 @@ $navigation-bar-size: map-deep-merge(
 );
 
 $navigation-bar-base: () !default;
+$navigation-bar-base: map-deep-merge(
+	(
+		border-color: transparent,
+		border-style: solid,
+	),
+	$navigation-bar-base
+);
 
 $navigation-bar-light: () !default;
 $navigation-bar-light: map-deep-merge(