1 files changed, 4 insertions, 0 deletions
diff --git a/lib/md4.c b/lib/md4.c
index 4dab6af7a..10e6fc537 100644
--- a/lib/md4.c
+++ b/lib/md4.c
@@ -29,6 +29,10 @@
 
 #ifdef USE_OPENSSL
 #include <openssl/opensslconf.h>
+#if defined(OPENSSL_VERSION_MAJOR) && (OPENSSL_VERSION_MAJOR >= 3)
+/* OpenSSL 3.0.0 marks the MD4 functions as deprecated */
+#define OPENSSL_NO_MD4
+#endif
 #endif /* USE_OPENSSL */
 
 #ifdef USE_MBEDTLS