diff --git a/src/app/components/menu/menu.ts b/src/app/components/menu/menu.ts
index d6b14c02659..354e2b97f78 100755
--- a/src/app/components/menu/menu.ts
+++ b/src/app/components/menu/menu.ts
@@ -159,7 +159,7 @@ export class MenuItemContent {
                 class="p-menu-list p-reset"
                 role="menu"
                 [attr.id]="id + '_list'"
-                [tabindex]="tabindex"
+                [attr.tabindex]="getTabIndexValue()"
                 [attr.data-pc-section]="'menu'"
                 [attr.aria-activedescendant]="activedescendant()"
                 [attr.aria-label]="ariaLabel"
@@ -432,6 +432,10 @@ export class Menu implements OnDestroy {
         });
     }
 
+    getTabIndexValue(): string | null {
+        return this.tabindex !== undefined ? this.tabindex.toString() : null;
+    }
+
     onOverlayAnimationStart(event: AnimationEvent) {
         switch (event.toState) {
             case 'visible':