diff --git a/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf b/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
index 5674714cea..36552bc4f4 100644
--- a/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
+++ b/CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
@@ -7,7 +7,7 @@
 #  buffer overflow or integer overflow.
 #
 #  Note: MD4 Digest functions, SHA-384 Digest functions, SHA-512 Digest functions,
-#  HMAC-MD5 functions, HMAC-SHA1/SHA256 functions, TDES/ARC4 functions, RSA external
+#  HMAC-MD5 functions, HMAC-SHA1 functions, TDES/ARC4 functions, RSA external
 #  functions, PKCS#7 SignedData sign functions, Diffie-Hellman functions, and 
 #  authenticode signature verification functions are not supported in this instance.
 #
@@ -46,7 +46,7 @@
   Hash/CryptSha512Null.c
   Hmac/CryptHmacMd5Null.c
   Hmac/CryptHmacSha1Null.c
-  Hmac/CryptHmacSha256Null.c
+  Hmac/CryptHmacSha256.c
   Cipher/CryptAes.c
   Cipher/CryptTdesNull.c
   Cipher/CryptArc4Null.c