diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index 067aa046e0..7a6ef10b2d 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -985,10 +985,16 @@ int getpwuid_r(uid_t uid, struct passwd *pwd, char *buf,
 #  endif
 #endif
 
+#ifdef USE_OPENSSL
 /* OpenSSLv3 marks DES, MD5 and ENGINE functions deprecated but we have no
    replacements (yet) so tell the compiler to not warn for them. */
-#ifdef USE_OPENSSL
-#define OPENSSL_SUPPRESS_DEPRECATED
+#  define OPENSSL_SUPPRESS_DEPRECATED
+#  ifdef _WIN32
+/* Silence LibreSSL warnings about wincrypt.h collision. Works in 3.8.2+ */
+#    ifndef LIBRESSL_DISABLE_OVERRIDE_WINCRYPT_DEFINES_WARNING
+#    define LIBRESSL_DISABLE_OVERRIDE_WINCRYPT_DEFINES_WARNING
+#    endif
+#  endif
 #endif
 
 #if defined(CURL_INLINE)