diff --git a/tf-psa-crypto/drivers/builtin/include/mbedtls/sha512.h b/tf-psa-crypto/drivers/builtin/include/mbedtls/sha512.h
index 002fe9d..9d01918 100644
--- a/tf-psa-crypto/drivers/builtin/include/mbedtls/sha512.h
+++ b/tf-psa-crypto/drivers/builtin/include/mbedtls/sha512.h
@@ -121,21 +121,6 @@
                           unsigned char *output);
 
 /**
- * \brief          This function processes a single data block within
- *                 the ongoing SHA-512 computation.
- *                 This function is for internal use only.
- *
- * \param ctx      The SHA-512 context. This must be initialized.
- * \param data     The buffer holding one block of data. This
- *                 must be a readable buffer of length \c 128 Bytes.
- *
- * \return         \c 0 on success.
- * \return         A negative error code on failure.
- */
-int mbedtls_internal_sha512_process(mbedtls_sha512_context *ctx,
-                                    const unsigned char data[128]);
-
-/**
  * \brief          This function calculates the SHA-512 or SHA-384
  *                 checksum of a buffer.
  *
diff --git a/tf-psa-crypto/drivers/builtin/src/sha512.c b/tf-psa-crypto/drivers/builtin/src/sha512.c
index 52b4f62..a5ed782 100644
--- a/tf-psa-crypto/drivers/builtin/src/sha512.c
+++ b/tf-psa-crypto/drivers/builtin/src/sha512.c
@@ -551,13 +551,6 @@
     return processed;
 }
 
-#if defined(MBEDTLS_SHA512_USE_A64_CRYPTO_IF_PRESENT)
-/*
- * This function is for internal use only if we are building both C and A64
- * versions, otherwise it is renamed to be the public mbedtls_internal_sha512_process()
- */
-static
-#endif
 int mbedtls_internal_sha512_process_a64_crypto(mbedtls_sha512_context *ctx,
                                                const unsigned char data[SHA512_BLOCK_SIZE])
 {
@@ -586,13 +579,6 @@
 
 #if !defined(MBEDTLS_SHA512_USE_A64_CRYPTO_ONLY)
 
-#if defined(MBEDTLS_SHA512_USE_A64_CRYPTO_IF_PRESENT)
-/*
- * This function is for internal use only if we are building both C and A64
- * versions, otherwise it is renamed to be the public mbedtls_internal_sha512_process()
- */
-static
-#endif
 int mbedtls_internal_sha512_process_c(mbedtls_sha512_context *ctx,
                                       const unsigned char data[SHA512_BLOCK_SIZE])
 {
@@ -737,7 +723,7 @@
     }
 }
 
-int mbedtls_internal_sha512_process(mbedtls_sha512_context *ctx,
+static int mbedtls_internal_sha512_process(mbedtls_sha512_context *ctx,
                                     const unsigned char data[SHA512_BLOCK_SIZE])
 {
     if (mbedtls_a64_crypto_sha512_has_support()) {