diff --git a/include/mbedtls/x509_crt.h b/include/mbedtls/x509_crt.h
index 1ddc997..add6b03 100644
--- a/include/mbedtls/x509_crt.h
+++ b/include/mbedtls/x509_crt.h
@@ -24,6 +24,7 @@
 #include "mbedtls/private_access.h"
 
 #include "mbedtls/build_info.h"
+#include "mbedtls/legacy_or_psa.h"
 
 #include "mbedtls/x509.h"
 #include "mbedtls/x509_crl.h"
@@ -1108,7 +1109,7 @@
 int mbedtls_x509write_crt_set_basic_constraints( mbedtls_x509write_cert *ctx,
                                          int is_ca, int max_pathlen );
 
-#if defined(MBEDTLS_SHA1_C) || ( defined(MBEDTLS_PSA_CRYPTO_C) && defined(PSA_WANT_ALG_SHA_1) )
+#if defined(MBEDTLS_HAS_ALG_SHA_1_VIA_LOWLEVEL_OR_PSA)
 /**
  * \brief           Set the subjectKeyIdentifier extension for a CRT
  *                  Requires that mbedtls_x509write_crt_set_subject_key() has been
@@ -1130,7 +1131,7 @@
  * \return          0 if successful, or a MBEDTLS_ERR_X509_ALLOC_FAILED
  */
 int mbedtls_x509write_crt_set_authority_key_identifier( mbedtls_x509write_cert *ctx );
-#endif /* MBEDTLS_SHA1_C || (MBEDTLS_PSA_CRYPTO_C && PSA_WANT_ALG_SHA_1)*/
+#endif /* MBEDTLS_HAS_ALG_SHA_1_VIA_LOWLEVEL_OR_PSA */
 
 /**
  * \brief           Set the Key Usage Extension flags