diff --git a/src/mococrw/openssl_wrap.h b/src/mococrw/openssl_wrap.h
index 6dfb159..f3e84b3 100644
--- a/src/mococrw/openssl_wrap.h
+++ b/src/mococrw/openssl_wrap.h
@@ -19,6 +19,7 @@
 #pragma once
 
 #include <sys/types.h>
+#include <array>
 #include <chrono>
 #include <ctime>
 #include <limits>