diff --git a/files/auth/start.sh b/files/auth/start.sh
index 435ef7e06a8b905dd40bc97cec5803dea39b17e0..51242d34df28bb2b24c176c1770acc328f5caba8 100644
--- a/files/auth/start.sh
+++ b/files/auth/start.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# Set the keytab. Otherwise, it won't find the appropriate keys.
+export KRB5_KTNAME=$(pwd)/keys/kerberos.keytab
+
 if grep "aes-devel" /etc/hostname > /dev/null
 then
     # Allow debug auth when on the devel system.