diff --git a/src/components/autocomplete/AutoComplete.vue b/src/components/autocomplete/AutoComplete.vue
index 9a8239c88..45803f8a9 100755
--- a/src/components/autocomplete/AutoComplete.vue
+++ b/src/components/autocomplete/AutoComplete.vue
@@ -256,6 +256,9 @@ export default {
         isOptionDisabled(option) {
             return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;
         },
+        isOptionGroup(option) {
+            return this.optionGroupLabel && option.optionGroup && option.group;
+        },
         getOptionGroupLabel(optionGroup) {
             return ObjectUtils.resolveFieldData(optionGroup, this.optionGroupLabel);
         },
@@ -702,9 +705,6 @@ export default {
         isDropdownClicked(event) {
             return this.$refs.dropdownButton ? (event.target === this.$refs.dropdownButton || this.$refs.dropdownButton.$el.contains(event.target)) : false;
         },
-        isOptionGroup(option) {
-            return this.optionGroupLabel && option.optionGroup && option.group;
-        },
         isOptionMatched(option, value) {
             return this.isValidOption(option) && this.getOptionLabel(option).toLocaleLowerCase(this.searchLocale) === value.toLocaleLowerCase(this.searchLocale);
         },
diff --git a/src/components/dropdown/Dropdown.vue b/src/components/dropdown/Dropdown.vue
index a08297bd7..11b647d99 100755
--- a/src/components/dropdown/Dropdown.vue
+++ b/src/components/dropdown/Dropdown.vue
@@ -243,6 +243,9 @@ export default {
         isOptionDisabled(option) {
             return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;
         },
+        isOptionGroup(option) {
+            return this.optionGroupLabel && option.optionGroup && option.group;
+        },
         getOptionGroupLabel(optionGroup) {
             return ObjectUtils.resolveFieldData(optionGroup, this.optionGroupLabel);
         },
@@ -661,9 +664,6 @@ export default {
         hasFocusableElements() {
             return DomHandler.getFocusableElements(this.overlay, ':not(.p-hidden-focusable)').length > 0;
         },
-        isOptionGroup(option) {
-            return this.optionGroupLabel && option.optionGroup && option.group;
-        },
         isOptionMatched(option) {
             return this.isValidOption(option) && this.getOptionLabel(option).toLocaleLowerCase(this.filterLocale).startsWith(this.searchValue.toLocaleLowerCase(this.filterLocale));
         },
diff --git a/src/components/listbox/Listbox.vue b/src/components/listbox/Listbox.vue
index 68bf1474e..fb491abd1 100755
--- a/src/components/listbox/Listbox.vue
+++ b/src/components/listbox/Listbox.vue
@@ -171,6 +171,9 @@ export default {
         isOptionDisabled(option) {
             return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;
         },
+        isOptionGroup(option) {
+            return this.optionGroupLabel && option.optionGroup && option.group;
+        },
         getOptionGroupLabel(optionGroup) {
             return ObjectUtils.resolveFieldData(optionGroup, this.optionGroupLabel);
         },
@@ -486,9 +489,6 @@ export default {
         onShiftKey() {
             this.startRangeIndex = this.focusedOptionIndex;
         },
-        isOptionGroup(option) {
-            return this.optionGroupLabel && option.optionGroup && option.group;
-        },
         isOptionMatched(option) {
             return this.isValidOption(option) && this.getOptionLabel(option).toLocaleLowerCase(this.filterLocale).startsWith(this.searchValue.toLocaleLowerCase(this.filterLocale));
         },
diff --git a/src/components/multiselect/MultiSelect.vue b/src/components/multiselect/MultiSelect.vue
index ffafad12a..6063c3ab1 100755
--- a/src/components/multiselect/MultiSelect.vue
+++ b/src/components/multiselect/MultiSelect.vue
@@ -295,6 +295,9 @@ export default {
 
             return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;
         },
+        isOptionGroup(option) {
+            return this.optionGroupLabel && option.optionGroup && option.group;
+        },
         getOptionGroupLabel(optionGroup) {
             return ObjectUtils.resolveFieldData(optionGroup, this.optionGroupLabel);
         },
@@ -776,9 +779,6 @@ export default {
         hasFocusableElements() {
             return DomHandler.getFocusableElements(this.overlay, ':not(.p-hidden-focusable)').length > 0;
         },
-        isOptionGroup(option) {
-            return this.optionGroupLabel && option.optionGroup && option.group;
-        },
         isOptionMatched(option) {
             return this.isValidOption(option) && this.getOptionLabel(option).toLocaleLowerCase(this.filterLocale).startsWith(this.searchValue.toLocaleLowerCase(this.filterLocale));
         },