diff --git a/src/haproxy.c b/src/haproxy.c
index f6985f1b6..205c19a06 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -3780,10 +3780,12 @@ int main(int argc, char **argv)
 		}
 
 		list_for_each_entry(proc, &proc_list, list) {
-			if (proc->pid == -1)
+			if (proc->pid == -1 && proc->options & PROC_O_TYPE_WORKER)
 				break;
 		}
 
+		BUG_ON(!(proc->options & PROC_O_TYPE_WORKER));
+
 		if (send_fd_uxst(proc->ipc_fd[1], sock_pair[0]) == -1) {
 			ha_alert("[%s.main()] Cannot transfer connection fd %d over the sockpair@%d\n",
 				 argv[0], sock_pair[0], proc->ipc_fd[1]);