diff --git a/src/app/components/multiselect/multiselect.ts b/src/app/components/multiselect/multiselect.ts
index b53c9bbc00e..a5c5e61326b 100755
--- a/src/app/components/multiselect/multiselect.ts
+++ b/src/app/components/multiselect/multiselect.ts
@@ -1866,7 +1866,7 @@ export class MultiSelect implements OnInit, AfterViewInit, AfterContentInit, Aft
             this.filterInputChild.nativeElement.value = '';
         }
 
-        this._filterValue = null;
+        this._filterValue.set(null);
         this._filteredOptions = null;
     }