diff --git a/crypto/evp/m_md4.c b/crypto/evp/m_md4.c
index 29d957c2f4..6a24ceb86d 100644
--- a/crypto/evp/m_md4.c
+++ b/crypto/evp/m_md4.c
@@ -66,7 +66,7 @@
 static EVP_MD md4_md=
 	{
 	NID_md4,
-	NULL,
+	0,
 	MD4_DIGEST_LENGTH,
 	MD4_Init,
 	MD4_Update,