diff --git a/apps/v4/registry/bases/base/ui/separator.tsx b/apps/v4/registry/bases/base/ui/separator.tsx
index cf212eb4ded..41033937081 100644
--- a/apps/v4/registry/bases/base/ui/separator.tsx
+++ b/apps/v4/registry/bases/base/ui/separator.tsx
@@ -14,7 +14,7 @@ function Separator({
       data-slot="separator"
       orientation={orientation}
       className={cn(
-        "shrink-0 bg-border data-horizontal:h-px data-horizontal:w-full data-vertical:w-px data-vertical:self-stretch",
+        "shrink-0 bg-border data-horizontal:h-px data-horizontal:w-full data-vertical:h-full data-vertical:w-px",
         className
       )}
       {...props}
diff --git a/apps/v4/registry/bases/radix/ui/separator.tsx b/apps/v4/registry/bases/radix/ui/separator.tsx
index cfc2811dbbd..fd8c1774ae6 100644
--- a/apps/v4/registry/bases/radix/ui/separator.tsx
+++ b/apps/v4/registry/bases/radix/ui/separator.tsx
@@ -17,7 +17,7 @@ function Separator({
       decorative={decorative}
       orientation={orientation}
       className={cn(
-        "shrink-0 bg-border data-horizontal:h-px data-horizontal:w-full data-vertical:w-px data-vertical:self-stretch",
+        "shrink-0 bg-border data-horizontal:h-px data-horizontal:w-full data-vertical:h-full data-vertical:w-px",
         className
       )}
       {...props}