diff --git a/core/rtw_security.c b/core/rtw_security.c
index b537a26..0f98c6a 100644
--- a/core/rtw_security.c
+++ b/core/rtw_security.c
@@ -2133,7 +2133,7 @@ BIP_exit:
 #ifndef PLATFORM_FREEBSD
 #if defined(CONFIG_TDLS)
 /* compress 512-bits */
-static int sha256_compress(struct sha256_state *md, unsigned char *buf)
+static int sha256_compress(struct rtw_sha256_state *md, unsigned char *buf)
 {
 	u32 S[8], W[64], t0, t1;
 	u32 t;
@@ -2181,7 +2181,7 @@ static int sha256_compress(struct sha256_state *md, unsigned char *buf)
 }
 
 /* Initialize the hash state */
-static void sha256_init(struct sha256_state *md)
+static void sha256_init(struct rtw_sha256_state *md)
 {
 	md->curlen = 0;
 	md->length = 0;
@@ -2202,7 +2202,7 @@ static void sha256_init(struct sha256_state *md)
    @param inlen  The length of the data (octets)
    @return CRYPT_OK if successful
 */
-static int sha256_process(struct sha256_state *md, unsigned char *in,
+static int sha256_process(struct rtw_sha256_state *md, unsigned char *in,
 			  unsigned long inlen)
 {
 	unsigned long n;
@@ -2243,7 +2243,7 @@ static int sha256_process(struct sha256_state *md, unsigned char *in,
    @param out [out] The destination of the hash (32 bytes)
    @return CRYPT_OK if successful
 */
-static int sha256_done(struct sha256_state *md, unsigned char *out)
+static int sha256_done(struct rtw_sha256_state *md, unsigned char *out)
 {
 	int i;
 
@@ -2293,7 +2293,7 @@ static int sha256_done(struct sha256_state *md, unsigned char *out)
 static int sha256_vector(size_t num_elem, u8 *addr[], size_t *len,
 			 u8 *mac)
 {
-	struct sha256_state ctx;
+	struct rtw_sha256_state ctx;
 	size_t i;
 
 	sha256_init(&ctx);
diff --git a/include/rtw_security.h b/include/rtw_security.h
index 58362eb..f4fc8fb 100644
--- a/include/rtw_security.h
+++ b/include/rtw_security.h
@@ -254,7 +254,7 @@ struct security_priv {
 #define SEC_IS_BIP_KEY_INSTALLED(sec) _FALSE
 #endif
 
-struct sha256_state {
+struct rtw_sha256_state {
 	u64 length;
 	u32 state[8], curlen;
 	u8 buf[64];