diff --git a/wolfssl/openssl/crypto.h b/wolfssl/openssl/crypto.h
index 7b1dab137..6b701aaec 100644
--- a/wolfssl/openssl/crypto.h
+++ b/wolfssl/openssl/crypto.h
@@ -39,6 +39,8 @@ WOLFSSL_API unsigned long wolfSSLeay(void);
 WOLFSSL_API unsigned long wolfSSL_OpenSSL_version_num(void);
 
 #ifdef OPENSSL_EXTRA
+#include <stdint.h>
+
 WOLFSSL_API void wolfSSL_OPENSSL_free(void*);
 WOLFSSL_API void *wolfSSL_OPENSSL_malloc(size_t a);
 
diff --git a/wolfssl/openssl/ssl.h b/wolfssl/openssl/ssl.h
index ce9e538b4..e2673048e 100644
--- a/wolfssl/openssl/ssl.h
+++ b/wolfssl/openssl/ssl.h
@@ -68,6 +68,7 @@
 #endif
 
 #ifdef OPENSSL_EXTRA
+#include <stdint.h>
 WOLFSSL_API int wolfSSL_OPENSSL_init_ssl(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings);
 #endif