diff --git a/lib/core/form/components/widgets/core/form-field-validator.spec.ts b/lib/core/form/components/widgets/core/form-field-validator.spec.ts
index 6077d1ff35..5d9c0cd711 100644
--- a/lib/core/form/components/widgets/core/form-field-validator.spec.ts
+++ b/lib/core/form/components/widgets/core/form-field-validator.spec.ts
@@ -101,6 +101,18 @@ describe('FormFieldValidator', () => {
             expect(validator.validate(field)).toBe(false);
         });
 
+        it('should fail for dropdown with null value', () => {
+            const field = new FormFieldModel(new FormModel(), {
+                type: FormFieldTypes.DROPDOWN,
+                value: null,
+                required: true,
+                options: [{ id: 'one', name: 'one' }],
+                selectionType: 'multiple'
+            });
+
+            expect(validator.validate(field)).toBe(false);
+        });
+
         it('should fail for radio buttons', () => {
             const field = new FormFieldModel(new FormModel(), {
                 type: FormFieldTypes.RADIO_BUTTONS,
diff --git a/lib/core/form/components/widgets/core/form-field-validator.ts b/lib/core/form/components/widgets/core/form-field-validator.ts
index 5f67126b5c..a0890d66e9 100644
--- a/lib/core/form/components/widgets/core/form-field-validator.ts
+++ b/lib/core/form/components/widgets/core/form-field-validator.ts
@@ -60,7 +60,7 @@ export class RequiredFieldValidator implements FormFieldValidator {
 
             if (field.type === FormFieldTypes.DROPDOWN) {
                 if (field.hasMultipleValues) {
-                    return !!field.value.length;
+                    return Array.isArray(field.value) && !!field.value.length;
                 }
 
                 if (field.hasEmptyValue && field.emptyOption) {