diff --git a/library/ssl_msg.c b/library/ssl_msg.c
index d0f281975a..7e91a441e6 100644
--- a/library/ssl_msg.c
+++ b/library/ssl_msg.c
@@ -5413,7 +5413,7 @@ static int ssl_tls13_handle_hs_message_post_handshake(mbedtls_ssl_context *ssl)
         }
     }
 #else
-    (void)ssl;
+    (void) ssl;
 #endif /* MBEDTLS_SSL_CLI_C */
 
     /* Fail in all other cases. */