diff --git a/components/lib/dropdown/BaseDropdown.vue b/components/lib/dropdown/BaseDropdown.vue
index bf768b8ea..ceecc6cc1 100644
--- a/components/lib/dropdown/BaseDropdown.vue
+++ b/components/lib/dropdown/BaseDropdown.vue
@@ -153,11 +153,11 @@ export default {
     props: {
         modelValue: null,
         options: Array,
-        optionLabel: String || Function,
-        optionValue: String || Function,
-        optionDisabled: String || Function,
-        optionGroupLabel: String || Function,
-        optionGroupChildren: String || Function,
+        optionLabel: [String, Function],
+        optionValue: [String, Function],
+        optionDisabled: [String, Function],
+        optionGroupLabel: [String, Function],
+        optionGroupChildren: [String, Function],
         scrollHeight: {
             type: String,
             default: '200px'