diff --git a/examples/simple_example/main.cc b/examples/simple_example/main.cc
index 2b565f43..646530e3 100755
--- a/examples/simple_example/main.cc
+++ b/examples/simple_example/main.cc
@@ -84,10 +84,12 @@ int main()
 
     drogon::HttpAppFramework::instance().addListener("0.0.0.0",12345);
     drogon::HttpAppFramework::instance().addListener("0.0.0.0",8080);
+#ifdef USE_OPENSSL
     //https
     drogon::HttpAppFramework::instance().setSSLFiles("server.pem","server.pem");
     drogon::HttpAppFramework::instance().addListener("0.0.0.0",4430,true);
     drogon::HttpAppFramework::instance().addListener("0.0.0.0",4431,true);
+#endif
     drogon::HttpAppFramework::instance().setThreadNum(4);
     trantor::Logger::setLogLevel(trantor::Logger::TRACE);
     //class function