diff --git a/projects/common/models/elements/input-elements/radio-button-group-complex.ts b/projects/common/models/elements/input-elements/radio-button-group-complex.ts
index 9e836452d86c9b48906bfd01156965413b63b8af..629d68d8c0dad8d13ae9d0cec4c58c46b51f2960 100644
--- a/projects/common/models/elements/input-elements/radio-button-group-complex.ts
+++ b/projects/common/models/elements/input-elements/radio-button-group-complex.ts
@@ -54,7 +54,7 @@ export class RadioButtonGroupComplexElement extends InputElement
       type: 'integer',
       format: '',
       multiple: false,
-      nullable: !this.value && this.value !== 0,
+      nullable: false,
       values: this.getAnswerSchemeValues(),
       valuesComplete: true
     };