diff --git a/commands/service/service.c b/commands/service/service.c
index 9848548b8..5e025c3dd 100644
--- a/commands/service/service.c
+++ b/commands/service/service.c
@@ -721,7 +721,7 @@ PRIVATE void do_cpu(config_t *cpe)
 			cpe->word, cpe->file, cpe->line);
 	}
 
-	if (cpu <= 0)
+	if (cpu < 0)
 	{
 		fatal("do_cpu: %d out of range at %s:%d",
 			cpu, cpe->file, cpe->line);
diff --git a/include/minix/rs.h b/include/minix/rs.h
index 997f31cce..5d64ff756 100644
--- a/include/minix/rs.h
+++ b/include/minix/rs.h
@@ -49,8 +49,8 @@ struct rs_start
 	uid_t rss_uid;
 	endpoint_t rss_sigmgr;
 	endpoint_t rss_scheduler;
-	unsigned rss_priority;
-	unsigned rss_quantum;
+	int rss_priority;
+	int rss_quantum;
 	int rss_major;
 	int rss_dev_style;
 	long rss_period;