diff --git a/include/gmssl/tls.h b/include/gmssl/tls.h
index 4479208f6..cb15829f6 100644
--- a/include/gmssl/tls.h
+++ b/include/gmssl/tls.h
@@ -718,7 +718,7 @@ typedef struct {
 
 	uint8_t record[TLS_MAX_RECORD_SIZE];
 
-	uint8_t databuf[TLS_MAX_PLAINTEXT_SIZE];
+	uint8_t databuf[TLS_MAX_RECORD_SIZE];
 	uint8_t *data;
 	size_t datalen;
 
diff --git a/src/debug.c b/src/debug.c
index 1e929fd05..d9d36c858 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -61,7 +61,7 @@ int format_bytes(FILE *fp, int format, int indent, const char *str, const uint8_
 {
 	int i;
 
-	if (datalen > 4096) {
+	if (datalen > (1<<24)) {
 		error_print();
 		return -1;
 	}