diff --git a/server/src/uds/REST/methods/authenticators.py b/server/src/uds/REST/methods/authenticators.py
index 9c46a3aba..9f73b9853 100644
--- a/server/src/uds/REST/methods/authenticators.py
+++ b/server/src/uds/REST/methods/authenticators.py
@@ -228,7 +228,7 @@ class Authenticators(ModelHandler):
         fields['mfa_id'] = None
         fields['small_name'] = fields['small_name'].strip().replace(' ', '-')
         # And ensure small_name chars are valid [ a-zA-Z0-9:-]+
-        if fields['small-name'] and not re.match(r'^[a-zA-Z0-9:-]+$', fields['small_name']):
+        if fields['small_name'] and not re.match(r'^[a-zA-Z0-9:-]+$', fields['small_name']):
             raise self.invalidRequestException(
                 _('Label must contain only letters, numbers, ":" and "-"')
             )