diff --git a/library/ssl_tls12_server.c b/library/ssl_tls12_server.c
index 3b8710e..40e6fc9 100644
--- a/library/ssl_tls12_server.c
+++ b/library/ssl_tls12_server.c
@@ -3081,7 +3081,7 @@
 
         size_t dig_signed_len = ssl->out_msg + ssl->out_msglen - dig_signed;
         size_t hashlen = 0;
-        unsigned char hash[MBEDTLS_HASH_MAX_SIZE];
+        unsigned char hash[MBEDTLS_MD_MAX_SIZE];
 
         int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;