diff --git a/tp-dropdown.js b/tp-dropdown.js
index 7d018aa..c30f060 100644
--- a/tp-dropdown.js
+++ b/tp-dropdown.js
@@ -252,8 +252,8 @@ export class TpDropdown extends BaseElement {
         <div id="popup" ?open="${isOpen}" part="popup">
           ${filterable ? html`
             <tp-input part="filter" exportparts="wrap:filterWrap" id="filter" .value=${this._filterTerm || ''} @input=${e => this._onFilterInput(e)} .inert=${!isOpen} ?hidden=${!(filterable || extensible)}>
-              <input type="text" placeholder=${filterPlaceholder}>
-              <tp-icon id="filterIcon" .icon=${extensible ? TpDropdown.addIcon : TpDropdown.filterIcon} slot="suffix"></tp-icon>
+              <input type="text" part="filterInput" placeholder=${filterPlaceholder}>
+              <tp-icon id="filterIcon" part="filterIcon" .icon=${extensible ? TpDropdown.addIcon : TpDropdown.filterIcon} slot="suffix"></tp-icon>
             </tp-input>
           ` : null}
           <div id="itemList" part="list">