diff --git a/sandbox-systrace.c b/sandbox-systrace.c
index b4d8d04ca..add4c46d0 100644
--- a/sandbox-systrace.c
+++ b/sandbox-systrace.c
@@ -59,6 +59,7 @@ static const struct sandbox_policy preauth_policy[] = {
 	{ SYS_getpgid, SYSTR_POLICY_PERMIT },
 	{ SYS_clock_gettime, SYSTR_POLICY_PERMIT },
 	{ SYS_gettimeofday, SYSTR_POLICY_PERMIT },
+	{ SYS_nanosleep, SYSTR_POLICY_PERMIT },
 	{ SYS_sigprocmask, SYSTR_POLICY_PERMIT },
 
 #ifdef SYS_getentropy