diff --git a/config.py b/config.py
index 2ea4b5bd..d5e27caf 100644
--- a/config.py
+++ b/config.py
@@ -72,13 +72,16 @@ class DevConfiguration(BaseConfiguration):
     LOG_LEVEL = 'debug'
     HOST = '0.0.0.0'
 
-    # This requires that your principal be listed server side in ProxyPrincipals.
-    KOJI_PROXYUSER = False
 
     if path.exists('/home/fedora/modularity.keytab'):
         KRB_PRINCIPAL = 'modularity@STG.FEDORAPROJECT.ORG'
         KRB_KEYTAB = '/home/fedora/modularity.keytab'
         KRB_CCACHE = '/var/tmp/krb5cc'
+    else:
+        # This requires that your principal be listed server side in
+        # ProxyPrincipals, and that is only true for our modularity system
+        # user.  See:   https://infrastructure.fedoraproject.org/cgit/ansible.git/commit/?id=a28a93dad75248c30c1792ec35f588c8e317c067
+        KOJI_PROXYUSER = False
 
     REQUIRE_PACKAGER = False
     # You only need these FAS options if you turn on authorization