diff --git a/src/components/dropdown/Dropdown.vue b/src/components/dropdown/Dropdown.vue
index ddcffbb42..14dce166e 100755
--- a/src/components/dropdown/Dropdown.vue
+++ b/src/components/dropdown/Dropdown.vue
@@ -31,7 +31,7 @@
                                 <ul :ref="contentRef" :class="['p-dropdown-items', styleClass]" :style="contentStyle" role="listbox">
                                     <template v-if="!optionGroupLabel">
                                         <li v-for="(option, i) of items" :class="['p-dropdown-item', {'p-highlight': isSelected(option), 'p-disabled': isOptionDisabled(option)}]" v-ripple
-                                            :key="getOptionRenderKey(option)" @click="onOptionSelect($event, option)" role="option" :aria-label="getOptionLabel(option)" :aria-selected="isSelected(option)">
+                                            :key="getOptionRenderKey(option, i)" @click="onOptionSelect($event, option)" role="option" :aria-label="getOptionLabel(option)" :aria-selected="isSelected(option)">
                                             <slot name="option" :option="option" :index="getOptionIndex(i, getItemOptions)">{{getOptionLabel(option)}}</slot>
                                         </li>
                                     </template>
@@ -41,7 +41,7 @@
                                                 <slot name="optiongroup" :option="optionGroup" :index="getOptionIndex(i, getItemOptions)">{{getOptionGroupLabel(optionGroup)}}</slot>
                                             </li>
                                             <li v-for="(option, i) of getOptionGroupChildren(optionGroup)" :class="['p-dropdown-item', {'p-highlight': isSelected(option), 'p-disabled': isOptionDisabled(option)}]" v-ripple
-                                                :key="getOptionRenderKey(option)" @click="onOptionSelect($event, option)" role="option" :aria-label="getOptionLabel(option)" :aria-selected="isSelected(option)">
+                                                :key="getOptionRenderKey(option, i)" @click="onOptionSelect($event, option)" role="option" :aria-label="getOptionLabel(option)" :aria-selected="isSelected(option)">
                                                 <slot name="option" :option="option" :index="getOptionIndex(i, getItemOptions)">{{getOptionLabel(option)}}</slot>
                                             </li>
                                         </template>
@@ -189,8 +189,8 @@ export default {
         getOptionValue(option) {
             return this.optionValue ? ObjectUtils.resolveFieldData(option, this.optionValue) : option;
         },
-        getOptionRenderKey(option) {
-            return this.dataKey ? ObjectUtils.resolveFieldData(option, this.dataKey) : this.getOptionLabel(option);
+        getOptionRenderKey(option, index) {
+            return this.dataKey ? ObjectUtils.resolveFieldData(option, this.dataKey) : this.getOptionLabel(option) + '_' + index.toString();
         },
         isOptionDisabled(option) {
             return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;