diff --git a/src/app/components/tree/tree.ts b/src/app/components/tree/tree.ts
index 86a4c935932..12e815912a1 100755
--- a/src/app/components/tree/tree.ts
+++ b/src/app/components/tree/tree.ts
@@ -103,7 +103,7 @@ import {
                             <ng-template *ngTemplateOutlet="tree.togglerIconTemplate; context: { $implicit: node.expanded }"></ng-template>
                         </span>
                     </button>
-                    <div class="p-checkbox p-component" [ngClass]="{ 'p-checkbox-disabled': node.selectable === false }" *ngIf="tree.selectionMode == 'checkbox'" aria-hidden="true">
+                    <div class="p-checkbox p-component" [ngClass]="{ 'p-checkbox-disabled p-disabled': node.selectable === false }" *ngIf="tree.selectionMode == 'checkbox'" aria-hidden="true">
                         <div class="p-checkbox-box" [ngClass]="{ 'p-highlight': isSelected(), 'p-indeterminate': node.partialSelected }" role="checkbox">
                             <ng-container *ngIf="!tree.checkboxIconTemplate">
                                 <CheckIcon *ngIf="!node.partialSelected && isSelected()" [styleClass]="'p-checkbox-icon'" />