diff --git a/sm4/ctr_amd64.go b/sm4/ctr_amd64.go
index ae30413..e0dad97 100644
--- a/sm4/ctr_amd64.go
+++ b/sm4/ctr_amd64.go
@@ -14,7 +14,7 @@ type ctr struct {
 
 const streamBufferSize = 512
 
-// NewCTR returns a Stream which encrypts/decrypts using the AES block
+// NewCTR returns a Stream which encrypts/decrypts using the SM4 block
 // cipher in counter mode. The length of iv must be the same as BlockSize.
 func (c *sm4CipherAsm) NewCTR(iv []byte) cipher.Stream {
 	if len(iv) != BlockSize {
diff --git a/sm4/gcm_amd64.go b/sm4/gcm_amd64.go
index c718e92..3b216c5 100644
--- a/sm4/gcm_amd64.go
+++ b/sm4/gcm_amd64.go
@@ -10,7 +10,7 @@ import (
 // Assert that sm4CipherAsm implements the gcmAble interface.
 var _ gcmAble = (*sm4CipherAsm)(nil)
 
-// NewGCM returns the AES cipher wrapped in Galois Counter Mode. This is only
+// NewGCM returns the SM4 cipher wrapped in Galois Counter Mode. This is only
 // called by crypto/cipher.NewGCM via the gcmAble interface.
 func (c *sm4CipherAsm) NewGCM(nonceSize, tagSize int) (cipher.AEAD, error) {
 	var key [gcmBlockSize]byte