diff --git a/components/lib/dropdown/Dropdown.vue b/components/lib/dropdown/Dropdown.vue
index 1136d7b04..bdb347f89 100755
--- a/components/lib/dropdown/Dropdown.vue
+++ b/components/lib/dropdown/Dropdown.vue
@@ -770,7 +770,7 @@ export default {
             return DomHandler.getFocusableElements(this.overlay, ':not([data-p-hidden-focusable="true"])').length > 0;
         },
         isOptionMatched(option) {
-            return this.isValidOption(option) && this.getOptionLabel(option)?.toLocaleLowerCase(this.filterLocale).startsWith(this.searchValue.toLocaleLowerCase(this.filterLocale));
+            return this.isValidOption(option) && typeof this.getOptionLabel(option) === 'string' && this.getOptionLabel(option)?.toLocaleLowerCase(this.filterLocale).startsWith(this.searchValue.toLocaleLowerCase(this.filterLocale));
         },
         isValidOption(option) {
             return ObjectUtils.isNotEmpty(option) && !(this.isOptionDisabled(option) || this.isOptionGroup(option));
diff --git a/components/lib/listbox/Listbox.vue b/components/lib/listbox/Listbox.vue
index 91d1fb965..1c11a688b 100755
--- a/components/lib/listbox/Listbox.vue
+++ b/components/lib/listbox/Listbox.vue
@@ -519,7 +519,7 @@ export default {
             this.startRangeIndex = this.focusedOptionIndex;
         },
         isOptionMatched(option) {
-            return this.isValidOption(option) && this.getOptionLabel(option)?.toLocaleLowerCase(this.filterLocale).startsWith(this.searchValue.toLocaleLowerCase(this.filterLocale));
+            return this.isValidOption(option) && typeof this.getOptionLabel(option) === 'string' && this.getOptionLabel(option)?.toLocaleLowerCase(this.filterLocale).startsWith(this.searchValue.toLocaleLowerCase(this.filterLocale));
         },
         isValidOption(option) {
             return ObjectUtils.isNotEmpty(option) && !(this.isOptionDisabled(option) || this.isOptionGroup(option));
diff --git a/components/lib/multiselect/MultiSelect.vue b/components/lib/multiselect/MultiSelect.vue
index d6cd13a32..c78f71100 100755
--- a/components/lib/multiselect/MultiSelect.vue
+++ b/components/lib/multiselect/MultiSelect.vue
@@ -811,7 +811,7 @@ export default {
             return DomHandler.getFocusableElements(this.overlay, ':not([data-p-hidden-focusable="true"])').length > 0;
         },
         isOptionMatched(option) {
-            return this.isValidOption(option) && this.getOptionLabel(option)?.toLocaleLowerCase(this.filterLocale).startsWith(this.searchValue.toLocaleLowerCase(this.filterLocale));
+            return this.isValidOption(option) && typeof this.getOptionLabel(option) === 'string' && this.getOptionLabel(option)?.toLocaleLowerCase(this.filterLocale).startsWith(this.searchValue.toLocaleLowerCase(this.filterLocale));
         },
         isValidOption(option) {
             return ObjectUtils.isNotEmpty(option) && !(this.isOptionDisabled(option) || this.isOptionGroup(option));