diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 33b89ef46..a2d57fcce 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -353,7 +353,6 @@
 //#define MBEDTLS_CMAC_ALT
 //#define MBEDTLS_MD5_ALT
 //#define MBEDTLS_RIPEMD160_ALT
-//#define MBEDTLS_SHA1_ALT
 //#define MBEDTLS_SHA256_ALT
 //#define MBEDTLS_SHA512_ALT
 
diff --git a/tests/include/alt-dummy/sha1_alt.h b/tests/include/alt-dummy/sha1_alt.h
deleted file mode 100644
index d8ac97191..000000000
--- a/tests/include/alt-dummy/sha1_alt.h
+++ /dev/null
@@ -1,16 +0,0 @@
-/* sha1_alt.h with dummy types for MBEDTLS_SHA1_ALT */
-/*
- *  Copyright The Mbed TLS Contributors
- *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
- */
-
-#ifndef SHA1_ALT_H
-#define SHA1_ALT_H
-
-typedef struct mbedtls_sha1_context {
-    int dummy;
-}
-mbedtls_sha1_context;
-
-
-#endif /* sha1_alt.h */
diff --git a/tf-psa-crypto/drivers/builtin/include/mbedtls/sha1.h b/tf-psa-crypto/drivers/builtin/include/mbedtls/sha1.h
index 592ffd13f..4b31c0250 100644
--- a/tf-psa-crypto/drivers/builtin/include/mbedtls/sha1.h
+++ b/tf-psa-crypto/drivers/builtin/include/mbedtls/sha1.h
@@ -30,10 +30,6 @@
 extern "C" {
 #endif
 
-#if !defined(MBEDTLS_SHA1_ALT)
-// Regular implementation
-//
-
 /**
  * \brief          The SHA-1 context structure.
  *
@@ -49,10 +45,6 @@ typedef struct mbedtls_sha1_context {
 }
 mbedtls_sha1_context;
 
-#else  /* MBEDTLS_SHA1_ALT */
-#include "sha1_alt.h"
-#endif /* MBEDTLS_SHA1_ALT */
-
 /**
  * \brief          This function initializes a SHA-1 context.
  *
diff --git a/tf-psa-crypto/drivers/builtin/src/sha1.c b/tf-psa-crypto/drivers/builtin/src/sha1.c
index dfbe481f3..c8d2852d4 100644
--- a/tf-psa-crypto/drivers/builtin/src/sha1.c
+++ b/tf-psa-crypto/drivers/builtin/src/sha1.c
@@ -22,8 +22,6 @@
 
 #include "mbedtls/platform.h"
 
-#if !defined(MBEDTLS_SHA1_ALT)
-
 void mbedtls_sha1_init(mbedtls_sha1_context *ctx)
 {
     memset(ctx, 0, sizeof(mbedtls_sha1_context));
@@ -346,8 +344,6 @@ exit:
     return ret;
 }
 
-#endif /* !MBEDTLS_SHA1_ALT */
-
 /*
  * output = SHA-1( input buffer )
  */