diff --git a/drivers/builtin_openssl2/crypto/o_str.c b/drivers/builtin_openssl2/crypto/o_str.c
index 56104a6c34b..d233afd46b6 100644
--- a/drivers/builtin_openssl2/crypto/o_str.c
+++ b/drivers/builtin_openssl2/crypto/o_str.c
@@ -63,7 +63,11 @@
 #if !defined(OPENSSL_IMPLEMENTS_strncasecmp) && \
     !defined(OPENSSL_SYSNAME_WIN32) && \
     !defined(NETWARE_CLIB)
-# include <strings.h>
+#ifdef _WIN32
+#include <string.h>
+#else
+#include <strings.h>
+#endif
 #endif
 
 int OPENSSL_strncasecmp(const char *str1, const char *str2, size_t n)
diff --git a/drivers/builtin_openssl2/openssl/rand.h b/drivers/builtin_openssl2/openssl/rand.h
index 290f069f4de..b5adb825fd2 100644
--- a/drivers/builtin_openssl2/openssl/rand.h
+++ b/drivers/builtin_openssl2/openssl/rand.h
@@ -64,6 +64,7 @@
 #include <openssl/e_os2.h>
 
 #if defined(OPENSSL_SYS_WINDOWS)
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #ifdef OCSP_RESPONSE
 #undef OCSP_RESPONSE