diff --git a/mbedtls-sys/vendor/include/mbedtls/sha512.h b/mbedtls-sys/vendor/include/mbedtls/sha512.h
index 4a8ab425..e43d8f4e 100644
--- a/mbedtls-sys/vendor/include/mbedtls/sha512.h
+++ b/mbedtls-sys/vendor/include/mbedtls/sha512.h
@@ -142,7 +142,7 @@ int mbedtls_sha512_update_ret( mbedtls_sha512_context *ctx,
  * \return         A negative error code on failure.
  */
 int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx,
-                               unsigned char output[64] );
+                               unsigned char *output );
 
 /**
  * \brief          This function processes a single data block within
@@ -255,7 +255,7 @@ MBEDTLS_DEPRECATED void mbedtls_sha512_process(
  */
 int mbedtls_sha512_ret( const unsigned char *input,
                         size_t ilen,
-                        unsigned char output[64],
+                        unsigned char *output,
                         int is384 );
 
 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
diff --git a/mbedtls-sys/vendor/library/sha512.c b/mbedtls-sys/vendor/library/sha512.c
index 06a628ae..bac7a4a1 100644
--- a/mbedtls-sys/vendor/library/sha512.c
+++ b/mbedtls-sys/vendor/library/sha512.c
@@ -404,7 +404,7 @@ void mbedtls_sha512_update( mbedtls_sha512_context *ctx,
  * SHA-512 final digest
  */
 int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx,
-                               unsigned char output[64] )
+                               unsigned char *output )
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned used;
@@ -485,7 +485,7 @@ void mbedtls_sha512_finish( mbedtls_sha512_context *ctx,
  */
 int mbedtls_sha512_ret( const unsigned char *input,
                     size_t ilen,
-                    unsigned char output[64],
+                    unsigned char *output,
                     int is384 )
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;