diff --git a/src/message.cc b/src/message.cc
index 5152a8e..9f3b4fd 100644
--- a/src/message.cc
+++ b/src/message.cc
@@ -110,8 +110,8 @@ namespace pEp {
         {
             if (encoding == "") {
                 string _mime_type = _bl->mime_type ? _bl->mime_type : "";
-                if (_mime_type == "application/pEp")
-                    encoding = "pep-sync";
+                if (_mime_type == "application/pEp.sync")
+                    encoding = "pep.sync";
                 else
                     encoding = "ascii";
             }
diff --git a/src/message_api.cc b/src/message_api.cc
index 6a52b9c..bdec3df 100644
--- a/src/message_api.cc
+++ b/src/message_api.cc
@@ -100,7 +100,7 @@ namespace pEp {
 
         object sync_search(string name)
         {
-            if (name != "pep-sync") {
+            if (name != "pep.sync") {
                 return object();
             }
             else {