diff --git a/src/villas-signal.cpp b/src/villas-signal.cpp index 4040cf7b6..0bbd8aeee 100644 --- a/src/villas-signal.cpp +++ b/src/villas-signal.cpp @@ -109,7 +109,7 @@ json_t * parse_cli(int argc, char *argv[]) continue; check: if (optarg == endptr) - logger->warn("Failed to parse parse option argument '-%c %s'", c, optarg); + logger->warn("Failed to parse parse option argument '-{} {}'", c, optarg); } if (argc != optind + 1)