diff --git a/src/material/menu/menu-trigger.ts b/src/material/menu/menu-trigger.ts
index 06de01f4fb1d..344de67922f1 100644
--- a/src/material/menu/menu-trigger.ts
+++ b/src/material/menu/menu-trigger.ts
@@ -416,6 +416,7 @@ export class MatMenuTrigger implements AfterContentInit, OnDestroy {
       positionStrategy: this._overlay.position()
           .flexibleConnectedTo(this._element)
           .withLockedPosition()
+          .withGrowAfterOpen()
           .withTransformOriginOn('.mat-menu-panel, .mat-mdc-menu-panel'),
       backdropClass: this.menu.backdropClass || 'cdk-overlay-transparent-backdrop',
       panelClass: this.menu.overlayPanelClass,