diff --git a/examples/spdycat.cc b/examples/spdycat.cc
index 1d3d902c..500a3ddb 100644
--- a/examples/spdycat.cc
+++ b/examples/spdycat.cc
@@ -61,7 +61,9 @@ struct Config {
   bool null_out;
   bool remote_name;
   bool verbose;
-  Config():null_out(false), remote_name(false), verbose(false) {}
+  bool spdy3_only;
+  Config():null_out(false), remote_name(false), verbose(false),
+           spdy3_only(false) {}
 };
 
 struct Request {
@@ -145,6 +147,9 @@ int communicate(const std::string& host, uint16_t port,
     return -1;
   }
   std::string next_proto;
+  if(config.spdy3_only) {
+    next_proto = "spdy/3";
+  }
   setup_ssl_ctx(ssl_ctx, &next_proto);
   SSL *ssl = SSL_new(ssl_ctx);
   if(!ssl) {
@@ -275,6 +280,8 @@ void print_help(std::ostream& out)
       << "                       The filename is dereived from URI. If URI\n"
       << "                       ends with '/', 'index.html' is used as a\n"
       << "                       filename. Not implemented yet.\n"
+      << "    -3, --spdy3        Only use SPDY/3.\n"
+      << "\n"
       << std::endl;
 }
 
@@ -285,11 +292,12 @@ int main(int argc, char **argv)
       {"verbose", no_argument, 0, 'v' },
       {"null-out", no_argument, 0, 'n' },
       {"remote-name", no_argument, 0, 'O' },
+      {"spdy3", no_argument, 0, '3' },
       {"help", no_argument, 0, 'h' },
       {0, 0, 0, 0 }
     };
     int option_index = 0;
-    int c = getopt_long(argc, argv, "Onhv", long_options, &option_index);
+    int c = getopt_long(argc, argv, "Onhv3", long_options, &option_index);
     if(c == -1) {
       break;
     }
@@ -306,6 +314,9 @@ int main(int argc, char **argv)
     case 'v':
       config.verbose = true;
       break;
+    case '3':
+      config.spdy3_only = true;
+      break;
     case '?':
       exit(EXIT_FAILURE);
     default:
diff --git a/examples/spdylay_ssl.cc b/examples/spdylay_ssl.cc
index 7b764de2..339b51c3 100644
--- a/examples/spdylay_ssl.cc
+++ b/examples/spdylay_ssl.cc
@@ -470,13 +470,18 @@ int select_next_proto_cb(SSL* ssl,
       std::cout << std::endl;
     }
   }
-  if(spdylay_select_next_protocol(out, outlen, in, inlen) != 1) {
-    std::cerr << "Server did not advertise spdy/2 or spdy/3 protocol."
-              << std::endl;
-    abort();
+  std::string& next_proto = *(std::string*)arg;
+  if(next_proto.empty()) {
+    if(spdylay_select_next_protocol(out, outlen, in, inlen) != 1) {
+      std::cerr << "Server did not advertise spdy/2 or spdy/3 protocol."
+                << std::endl;
+      abort();
+    } else {
+      next_proto.assign(&(*out)[0], &(*out)[*outlen]);
+    }
   } else {
-    std::string& next_proto = *(std::string*)arg;
-    next_proto.assign(&(*out)[0], &(*out)[*outlen]);
+    *out = (unsigned char*)(next_proto.c_str());
+    *outlen = next_proto.size();
   }
   if(ssl_debug) {
     std::cout << "          NPN selected the protocol: "