diff --git a/components/lib/treeselect/TreeSelect.vue b/components/lib/treeselect/TreeSelect.vue
index d2ebd94ab..56bf6d987 100644
--- a/components/lib/treeselect/TreeSelect.vue
+++ b/components/lib/treeselect/TreeSelect.vue
@@ -46,7 +46,7 @@
             <transition name="p-connected-overlay" @enter="onOverlayEnter" @leave="onOverlayLeave" @after-leave="onOverlayAfterLeave" v-bind="ptm('transition')">
                 <div v-if="overlayVisible" :ref="overlayRef" @click="onOverlayClick" :class="[cx('panel'), panelClass]" @keydown="onOverlayKeydown" v-bind="{ ...panelProps, ...ptm('panel') }">
                     <slot name="header" :value="modelValue" :options="options"></slot>
-                    <div :class="cx('panel')" :style="{ 'max-height': scrollHeight }" v-bind="ptm('wrapper')">
+                    <div :class="cx('wrapper')" :style="{ 'max-height': scrollHeight }" v-bind="ptm('wrapper')">
                         <TSTree
                             ref="tree"
                             :id="listId"