diff --git a/src/ng-multiselect-dropdown/src/multiselect.component.ts b/src/ng-multiselect-dropdown/src/multiselect.component.ts
index b6a27ef..21035f5 100644
--- a/src/ng-multiselect-dropdown/src/multiselect.component.ts
+++ b/src/ng-multiselect-dropdown/src/multiselect.component.ts
@@ -89,6 +89,10 @@ export class MultiSelectComponent implements ControlValueAccessor {
 
   @Output("onFilterChange")
   onFilterChange: EventEmitter<ListItem> = new EventEmitter<any>();
+  
+  @Output("onDropDownOpen")
+  onDropDownOpen: EventEmitter<ListItem> = new EventEmitter<any>();
+  
   @Output("onDropDownClose")
   onDropDownClose: EventEmitter<ListItem> = new EventEmitter<any>();
 
@@ -291,6 +295,7 @@ export class MultiSelectComponent implements ControlValueAccessor {
   toggleDropdown(evt) {
     evt.preventDefault();
     if (this.disabled && this._settings.singleSelection) {
+      this.onDropDownOpen.emit();
       return;
     }
     this._settings.defaultOpen = !this._settings.defaultOpen;