diff --git a/src/core/main.c b/src/core/main.c
index 623cbc4231..ccd35f19dd 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -1949,7 +1949,7 @@ static int initialize_runtime(
 
         if (arg_timer_slack_nsec != NSEC_INFINITY)
                 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
-                        log_error_errno(errno, "Failed to adjust timer slack: %m");
+                        log_warning_errno(errno, "Failed to adjust timer slack, ignoring: %m");
 
         if (arg_system && !cap_test_all(arg_capability_bounding_set)) {
                 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set);