diff --git a/example/defaults.conf b/example/defaults.conf
index f6ecedd..e2921a4 100644
--- a/example/defaults.conf
+++ b/example/defaults.conf
@@ -5,7 +5,7 @@
     short_name: osmo-gsm-tester-nitb
     long_name: osmo-gsm-tester-nitb
     auth_policy: closed
-    encryption: a5 0
+    encryption: a5_0
 
 bsc:
   net:
@@ -14,7 +14,7 @@
     short_name: osmo-gsm-tester-msc
     long_name: osmo-gsm-tester-msc
     auth_policy: closed
-    encryption: a5 0
+    encryption: a5_0
     authentication: optional
 
 msc:
@@ -24,7 +24,7 @@
     short_name: osmo-gsm-tester-msc
     long_name: osmo-gsm-tester-msc
     auth_policy: closed
-    encryption: a5 0
+    encryption: a5_0
     authentication: optional
 
 bsc_bts: