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-rw-r--r--src/unit.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/unit.c b/src/unit.c
index aed25e4f21..b7ff0c51fe 100644
--- a/src/unit.c
+++ b/src/unit.c
@@ -118,8 +118,10 @@ int unit_add_name(Unit *u, const char *text) {
if ((r = unit_name_to_instance(s, &i)) < 0)
goto fail;
- if (i && unit_vtable[t]->no_instances)
+ if (i && unit_vtable[t]->no_instances) {
+ r = -EINVAL;
goto fail;
+ }
/* Ensure that this unit is either instanced or not instanced,
* but not both. */