diff --git a/include/ossl_random.hpp b/include/ossl_random.hpp
index b392410..0e28944 100644
--- a/include/ossl_random.hpp
+++ b/include/ossl_random.hpp
@@ -2,7 +2,10 @@
 
 #include "logging.hpp"
 
+extern "C"
+{
 #include <openssl/rand.h>
+}
 
 #include <iostream>
 #include <limits>
diff --git a/include/ssl_key_handler.hpp b/include/ssl_key_handler.hpp
index d12fcab..d7255dd 100644
--- a/include/ssl_key_handler.hpp
+++ b/include/ssl_key_handler.hpp
@@ -8,7 +8,6 @@
 extern "C"
 {
 #include <nghttp2/nghttp2.h>
-}
 #include <openssl/bio.h>
 #include <openssl/dh.h>
 #include <openssl/dsa.h>
@@ -18,6 +17,7 @@
 #include <openssl/rand.h>
 #include <openssl/rsa.h>
 #include <openssl/ssl.h>
+}
 
 #include <boost/asio/ssl/context.hpp>