diff --git a/packages/primevue/src/menu/style/MenuStyle.js b/packages/primevue/src/menu/style/MenuStyle.js
index 24710cbdb..95fa188f2 100644
--- a/packages/primevue/src/menu/style/MenuStyle.js
+++ b/packages/primevue/src/menu/style/MenuStyle.js
@@ -77,7 +77,7 @@ const theme = ({ dt }) => `
 }
 
 .p-menu-separator {
-    border-top: 1px solid ${dt('menu.separator.border.color')};
+    border-block-start: 1px solid ${dt('menu.separator.border.color')};
 }
 `;