diff --git a/src/pEp.yml2 b/src/pEp.yml2
index 3fc0c5d..74ca7dd 100644
--- a/src/pEp.yml2
+++ b/src/pEp.yml2
@@ -141,7 +141,7 @@ namespace pEp {
                 in message src,
                 in stringlist extra,
                 creates message dst,
-                Cconst PEP_enc_format encformat "PEP_enc_PEP",
+                in EncFormat enc_format,
                 Cconst PEP_encrypt_flags flags "0"
             );