diff --git a/exec/upgrade_to_v320.js b/exec/upgrade_to_v320.js
index 69d3bd509e7c65838b5e0801626056018a7c3e6a..c516d75b2a46b689a501da0034261d7a6c186c35 100755
--- a/exec/upgrade_to_v320.js
+++ b/exec/upgrade_to_v320.js
@@ -332,7 +332,8 @@ for(var i in cnf.chan) {
 	delete obj.code;
 	obj.actions = cnf.actset[obj.actset].name;
 	delete obj.actset;
-	obj.guru = cnf.guru[obj.guru].code;
+	if(cnf.guru[obj.guru])
+		obj.guru = cnf.guru[obj.guru].code;
 	ini.iniSetObject(key, obj);
 }
 for(var i in cnf.chatact) {