diff --git a/projects/common/models/elements/input-elements/text-area-math.ts b/projects/common/models/elements/input-elements/text-area-math.ts
index 87d29500cbbdb830382ef3c1743ff59e73d3846a..6c52b3fd80359fcb5b6ef83f287cfe911716fdb9 100644
--- a/projects/common/models/elements/input-elements/text-area-math.ts
+++ b/projects/common/models/elements/input-elements/text-area-math.ts
@@ -53,7 +53,7 @@ export class TextAreaMathElement extends InputElement implements TextAreaMathPro
       type: 'string',
       format: 'math-ml',
       multiple: false,
-      nullable: !this.value && this.value !== '',
+      nullable: false,
       values: [],
       valuesComplete: false
     };