diff --git a/src/dropdown/dropdown.component.html b/src/dropdown/dropdown.component.html
index af034cbf..10190f2f 100644
--- a/src/dropdown/dropdown.component.html
+++ b/src/dropdown/dropdown.component.html
@@ -65,8 +65,8 @@
         </span>
       </span>
       <ng-template #label>
-        <span [class.disabled]="isCheckboxDisabled()">{{ option.name }}</span>
+        <span [class.disabled]="isCheckboxDisabled(option)">{{ option.name }}</span>
       </ng-template>
     </a>
   </div>
-</div>
\ No newline at end of file
+</div>
diff --git a/src/dropdown/dropdown.component.ts b/src/dropdown/dropdown.component.ts
index efabf0c5..08860cc1 100644
--- a/src/dropdown/dropdown.component.ts
+++ b/src/dropdown/dropdown.component.ts
@@ -642,8 +642,8 @@ export class MultiselectDropdownComponent
     }
   }
 
-  isCheckboxDisabled(option: IMultiSelectOption): boolean {
-    return this.disabledSelection || option.disabled;
+  isCheckboxDisabled(option?: IMultiSelectOption): boolean {
+    return this.disabledSelection || option && option.disabled;
   }
 
   checkScrollPosition(ev) {