diff --git a/src/pEp.yml2 b/src/pEp.yml2
index 8efea21..123a70d 100644
--- a/src/pEp.yml2
+++ b/src/pEp.yml2
@@ -315,7 +315,7 @@ namespace pEp {
         basic void config_passive_mode(bool enable);
         basic void config_unencrypted_subject(bool enable);
         basic string getCrashdumpLog(int maxlines);
-
+        basic string getProtocolVersion(int reserved);
     };
 
     struct message {