diff --git a/src/components/treetable/TreeTableRow.vue b/src/components/treetable/TreeTableRow.vue
index ba3e778d0..0b67d69be 100755
--- a/src/components/treetable/TreeTableRow.vue
+++ b/src/components/treetable/TreeTableRow.vue
@@ -1,7 +1,7 @@
 <template>
     <tr :class="containerClass" @click="onClick" @keydown="onKeyDown" @touchend="onTouchEnd" :style="node.style" tabindex="0">
         <td v-for="(col,i) of columns" :key="col.columnKey||col.field||i" :style="col.bodyStyle" :class="col.bodyClass">
-            <button class="p-treetable-toggler p-link" @click="toggle" v-if="col.expander" :style="togglerStyle" tabindex="-1" v-ripple>
+            <button type="button" class="p-treetable-toggler p-link" @click="toggle" v-if="col.expander" :style="togglerStyle" tabindex="-1" v-ripple>
                 <i :class="togglerIcon"></i>
             </button>
             <div class="p-checkbox p-treetable-checkbox p-component" @click="toggleCheckbox" v-if="checkboxSelectionMode && col.expander" role="checkbox" :aria-checked="checked">