diff --git a/library/x509write_crt.c b/library/x509write_crt.c
index 274eb4b..c89670a 100644
--- a/library/x509write_crt.c
+++ b/library/x509write_crt.c
@@ -569,7 +569,7 @@
     unsigned char *c, *c2;
     unsigned char sig[MBEDTLS_PK_SIGNATURE_MAX_SIZE];
     size_t hash_length = 0;
-    unsigned char hash[MBEDTLS_HASH_MAX_SIZE];
+    unsigned char hash[MBEDTLS_MD_MAX_SIZE];
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
     psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
     psa_algorithm_t psa_algorithm;