diff --git a/src/membership/forms.py b/src/membership/forms.py
index 9ade0e2..cf92d96 100644
--- a/src/membership/forms.py
+++ b/src/membership/forms.py
@@ -3,7 +3,7 @@ Created on 03.10.2011
 
 @author: Christian
 """
-
+from datetime import date, timedelta
 from captcha.fields import ReCaptchaField
 from django import forms
 from django.conf import settings
@@ -47,7 +47,12 @@ class MembershipForm(forms.ModelForm):
         for fieldname in self.required_membership_fields:
             if membership and not cleaned_data.get(fieldname):
                 self.add_error(fieldname, errormsg)
-
+        if membership and cleaned_data.get('birthday'):
+            birthday = cleaned_data.get('birthday')
+            print("Today:", date.today())
+            print("Birthday:", birthday)
+            if date.today().year - cleaned_data.get('birthday').year < 16:
+                self.add_error('birthday', 'Midestalter für Mitlieder ist 16 Jahre!')
 
 
 class RegistrationForm(MembershipForm):