diff --git a/src/basic/unit-name.c b/src/basic/unit-name.c
index 6fb9cbc361..13653d9b78 100644
--- a/src/basic/unit-name.c
+++ b/src/basic/unit-name.c
@@ -247,8 +247,6 @@ int unit_name_build(const char *prefix, const char *instance, const char *suffix
         assert(suffix);
         assert(ret);
 
-        if (isempty(suffix))
-                return -EINVAL;
         if (suffix[0] != '.')
                 return -EINVAL;