diff --git a/ntpd/ntp_sandbox.c b/ntpd/ntp_sandbox.c
index e66faaa8c..65a1b35d8 100644
--- a/ntpd/ntp_sandbox.c
+++ b/ntpd/ntp_sandbox.c
@@ -354,6 +354,7 @@ int scmp_sc[] = {
        SCMP_SYS(openat),       /* SUSE */
 #endif
        SCMP_SYS(poll),
+       SCMP_SYS(pread64),
        SCMP_SYS(pselect6),
        SCMP_SYS(read),
        SCMP_SYS(recvfrom),    /* Comment this out for testing.