diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 1bb0b1735..e86334c65 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -350,7 +350,6 @@
  */
 //#define MBEDTLS_TIMING_ALT
 
-//#define MBEDTLS_DES3_CRYPT_ECB_ALT
 //#define MBEDTLS_AES_SETKEY_ENC_ALT
 //#define MBEDTLS_AES_SETKEY_DEC_ALT
 //#define MBEDTLS_AES_ENCRYPT_ALT
diff --git a/tf-psa-crypto/drivers/builtin/src/des.c b/tf-psa-crypto/drivers/builtin/src/des.c
index b281757c5..73afb0454 100644
--- a/tf-psa-crypto/drivers/builtin/src/des.c
+++ b/tf-psa-crypto/drivers/builtin/src/des.c
@@ -675,7 +675,6 @@ exit:
 /*
  * 3DES-ECB block encryption/decryption
  */
-#if !defined(MBEDTLS_DES3_CRYPT_ECB_ALT)
 int mbedtls_des3_crypt_ecb(mbedtls_des3_context *ctx,
                            const unsigned char input[8],
                            unsigned char output[8])
@@ -712,7 +711,6 @@ int mbedtls_des3_crypt_ecb(mbedtls_des3_context *ctx,
 
     return 0;
 }
-#endif /* !MBEDTLS_DES3_CRYPT_ECB_ALT */
 
 #if defined(MBEDTLS_CIPHER_MODE_CBC)
 /*