diff --git a/core/AmB2BSession.cpp b/core/AmB2BSession.cpp
index 6fe8d803..6bf354a1 100644
--- a/core/AmB2BSession.cpp
+++ b/core/AmB2BSession.cpp
@@ -353,8 +353,8 @@ void AmB2BCallerSession::connectCallee(const string& remote_party,
 int AmB2BCallerSession::reinviteCaller(const AmSipReply& callee_reply)
 {
   string content_type = callee_reply.content_type;
-  if (!content_type.length())
-    content_type = getHeader(callee_reply.hdrs,"Content-Type");
+  if (!content_type.length()) 
+    content_type = getHeader(callee_reply.hdrs,"Content-Type", "c");
 
   return dlg.sendRequest("INVITE",content_type,callee_reply.body, "", SIP_FLAGS_VERBATIM);
 }