diff --git a/src/shared/varlink-io.systemd.Machine.c b/src/shared/varlink-io.systemd.Machine.c
index d37f672d05..5f70e0a823 100644
--- a/src/shared/varlink-io.systemd.Machine.c
+++ b/src/shared/varlink-io.systemd.Machine.c
@@ -104,7 +104,7 @@ static SD_VARLINK_DEFINE_METHOD_FULL(
                 SD_VARLINK_FIELD_COMMENT("Return the base UID/GID of the machine"),
                 SD_VARLINK_DEFINE_OUTPUT(UIDShift, SD_VARLINK_INT, SD_VARLINK_NULLABLE),
                 SD_VARLINK_FIELD_COMMENT("Subcgroup path of the machine, relative to the unit's cgroup path"),
-                SD_VARLINK_DEFINE_OUTPUT(Subgroup, SD_VARLINK_STRING, SD_VARLINK_NULLABLE),
+                SD_VARLINK_DEFINE_OUTPUT(subgroup, SD_VARLINK_STRING, SD_VARLINK_NULLABLE),
                 SD_VARLINK_FIELD_COMMENT("Numeric UNIX UID of the user who registered the machine"),
                 SD_VARLINK_DEFINE_OUTPUT(UID, SD_VARLINK_INT, SD_VARLINK_NULLABLE));