diff --git a/src/message.cc b/src/message.cc
index b5d360f..081b73b 100644
--- a/src/message.cc
+++ b/src/message.cc
@@ -5,6 +5,15 @@ namespace pEp {
     namespace PythonAdapter {
         using namespace std;
 
+        Message::Blob::Blob(bloblist_t *bl)
+            : data(bl->value, bl->value+bl->size)
+        {
+            if (bl->mime_type)
+                mime_type = bl->mime_type;
+            if (bl->filename)
+                filename = bl->filename;
+        }
+
         Message::Message(PEP_msg_direction dir)
             : _msg(new_message(dir))
         {
diff --git a/src/message.hh b/src/message.hh
index f008a84..5b8813a 100644
--- a/src/message.hh
+++ b/src/message.hh
@@ -12,9 +12,12 @@ namespace pEp {
 
         class Message {
             struct Blob {
-                vector<char> _value;
-                string _mime_type;
-                string _filename;
+                vector<char> data;
+                string mime_type;
+                string filename;
+                Blob() { }
+                Blob(bloblist_t *bl);
+                operator bloblist_t *();
             };
 
             message *_msg;