diff -ru aria2-1.18.10/src/LibgnutlsTLSSession.cc aria2-1.18.10.patched/src/LibgnutlsTLSSession.cc
--- aria2-1.18.10/src/LibgnutlsTLSSession.cc	2015-02-23 15:34:01.000000000 +0100
+++ aria2-1.18.10.patched/src/LibgnutlsTLSSession.cc	2015-02-27 19:49:13.649873035 +0100
@@ -127,20 +127,8 @@
   // It seems err is not error message, but the argument string
   // which causes syntax error.
   const char* err;
-  std::string pri = "SECURE128";
-  switch(tlsContext_->getMinTLSVersion()) {
-  case TLS_PROTO_TLS12:
-    pri += ":-VERS-TLS1.1";
-    // fall through
-  case TLS_PROTO_TLS11:
-    pri += ":-VERS-TLS1.0";
-    // fall through
-  case TLS_PROTO_TLS10:
-    pri += ":-VERS-SSL3.0";
-  default:
-    break;
-  };
-  rv_ = gnutls_priority_set_direct(sslSession_, pri.c_str(), &err);
+  rv_ = gnutls_priority_set_direct(sslSession_, "@SYSTEM", &err);
+
   if(rv_ != GNUTLS_E_SUCCESS) {
     return TLS_ERR_ERROR;
   }