diff --git a/app/schemas.py b/app/schemas.py
index 7f52b9541..a9811dfc3 100644
--- a/app/schemas.py
+++ b/app/schemas.py
@@ -213,7 +213,7 @@ class TemplateSchema(BaseTemplateSchema):
     @validates_schema
     def validate_type(self, data):
         template_type = data.get('template_type')
-        if template_type and template_type == 'email':
+        if template_type and template_type == models.EMAIL_TYPE:
             subject = data.get('subject')
             if not subject or subject.strip() == '':
                 raise ValidationError('Invalid template subject', 'subject')