diff --git a/library/ssl_tls13_keys.h b/library/ssl_tls13_keys.h
index 479bb4e..941a19e 100644
--- a/library/ssl_tls13_keys.h
+++ b/library/ssl_tls13_keys.h
@@ -621,7 +621,7 @@
  * \returns    A negative error code on failure.
  */
 int mbedtls_ssl_tls13_generate_resumption_master_secret(
-    mbedtls_ssl_context* ssl );
+    mbedtls_ssl_context *ssl );
 
 /**
  * \brief Calculate the verify_data value for the client or server TLS 1.3