diff --git a/src/worker-privs.c b/src/worker-privs.c
index e01be0ab..68550fb1 100644
--- a/src/worker-privs.c
+++ b/src/worker-privs.c
@@ -117,6 +117,7 @@ int disable_system_calls(struct worker_st *ws)
 #if defined(HAVE_CLOCK_GETTIME)
 	ADD_SYSCALL(clock_gettime, 0);
 #endif
+	ADD_SYSCALL(clock_nanosleep, 0);
 	ADD_SYSCALL(nanosleep, 0);
 	ADD_SYSCALL(getrusage, 0);
 	ADD_SYSCALL(alarm, 0);