diff --git a/include/boost/asio/ssl/detail/openssl_context_service.hpp b/include/boost/asio/ssl/detail/openssl_context_service.hpp
index 4ffc6de5..5f75aa95 100644
--- a/include/boost/asio/ssl/detail/openssl_context_service.hpp
+++ b/include/boost/asio/ssl/detail/openssl_context_service.hpp
@@ -309,9 +309,9 @@ public:
 
     ::BIO_free(bio);
     int result = ::SSL_CTX_set_tmp_dh(impl, dh);
+    ::DH_free(dh);
     if (result != 1)
     {
-      ::DH_free(dh);
       ec = boost::asio::error::invalid_argument;
       return ec;
     }