diff --git a/api-generator/components/treeselect.js b/api-generator/components/treeselect.js
index 4833df6b7..878d8e58f 100644
--- a/api-generator/components/treeselect.js
+++ b/api-generator/components/treeselect.js
@@ -196,7 +196,7 @@ const TreeSelectSlots = [
         description: 'Custom content when there is no data to display'
     },
     {
-        name: 'indicator',
+        name: 'triggericon',
         description: 'Custom content for the dropdown indicator'
     },
     {
diff --git a/components/lib/treeselect/TreeSelect.d.ts b/components/lib/treeselect/TreeSelect.d.ts
index ab0719ba2..b97820e08 100644
--- a/components/lib/treeselect/TreeSelect.d.ts
+++ b/components/lib/treeselect/TreeSelect.d.ts
@@ -148,8 +148,14 @@ export interface TreeSelectSlots {
     empty(): VNode[];
     /**
      * Custom indicator template.
+     * @deprecated since v3.27.0. Use 'checkboxicon' slot.
      */
     indicator(): VNode[];
+    /**
+     * Custom indicator template.
+     * @deprecated since v3.27.0. Use 'checkboxicon' slot.
+     */
+    triggericon(): VNode[];
     /**
      * Custom item toggler icon template.
      * @param {Object} scope - item toggler icon slot's params.
diff --git a/components/lib/treeselect/TreeSelect.vue b/components/lib/treeselect/TreeSelect.vue
index 83eb4ae46..260fab955 100644
--- a/components/lib/treeselect/TreeSelect.vue
+++ b/components/lib/treeselect/TreeSelect.vue
@@ -38,7 +38,7 @@
             </div>
         </div>
         <div class="p-treeselect-trigger" role="button" aria-haspopup="tree" :aria-expanded="overlayVisible">
-            <slot name="indicator">
+            <slot name="triggericon">
                 <component :is="'ChevronDownIcon'" class="p-treeselect-trigger-icon" />
             </slot>
         </div>