diff --git a/API reference details.md b/API reference details.md
index c2221d6..74449a1 100644
--- a/API reference details.md	
+++ b/API reference details.md	
@@ -143,6 +143,32 @@ encrypt message in memory
                                       and key is attached to it
 ```
 
+##### encrypt_message_and_add_priv_key( Message src, Message⇑ dst, String to_fingerprint, PEP_enc_format enc_format, Integer flags)
+encrypt message in memory, adding an encrypted private key (encrypted separately and sent within the inner message)
+```
+  parameters:
+      session (in)        session handle
+      src (in)            message to encrypt
+      dst (out)           pointer to new encrypted message or NULL if no
+                          encryption could take place
+      to_fpr              fingerprint of the recipient key to which the private key
+                          should be encrypted
+      enc_format (in)     encrypted format
+      flags (in)          flags to set special encryption features
+
+  return value:
+      PEP_STATUS_OK                   on success
+      PEP_KEY_HAS_AMBIG_NAME          at least one of the receipient keys has
+                                      an ambiguous name
+      PEP_UNENCRYPTED                 on demand or no recipients with usable
+                                      key, is left unencrypted, and key is
+                                      attached to it
+
+  caveat:
+      the ownershop of src remains with the caller
+      the ownership of dst goes to the caller
+```
+
 ##### encrypt_message_for_self(Identity target_id, Message src, Message⇑ dst, PEP_enc_format enc_format, Integer flags)
 encrypt message in memory for user's identity only,
 ignoring recipients and other identities from
diff --git a/API reference.md b/API reference.md
index 9af3d86..0aed484 100644
--- a/API reference.md	
+++ b/API reference.md	
@@ -12,6 +12,7 @@ Output parameters are denoted by a  **⇑** , InOut parameters are denoted by a
 | startKeyserverLookup | Void |  |
 | stopKeyserverLookup | Void |  |
 | encrypt_message | PEP_STATUS | Message, StringList, Message⇑, PEP_enc_format, Integer |
+| encrypt_message_and_add_priv_key | PEP_STATUS | Message, Message⇑, String, , PEP_enc_format, Integer |
 | encrypt_message_for_self | PEP_STATUS | Identity, Message, StringList, Message⇑, PEP_enc_format, Integer |
 | decrypt_message | PEP_STATUS | Message⇕, Message⇑, StringList⇑, PEP_rating⇑, Integer⇕ |
 | outgoing_message_rating | PEP_STATUS | Message, PEP_rating⇑ |