diff --git a/libc/calls/pledge-linux.c b/libc/calls/pledge-linux.c
index 1a1dce028..2bb52c038 100644
--- a/libc/calls/pledge-linux.c
+++ b/libc/calls/pledge-linux.c
@@ -615,6 +615,8 @@ static const uint16_t kPledgeStdio[] = {
     __NR_linux_msync,              //
     __NR_linux_mmap | NOEXEC,      //
     __NR_linux_mlock,              //
+    __NR_linux_mlock2,             //
+    __NR_linux_munlock,            //
     __NR_linux_mremap,             //
     __NR_linux_munmap,             //
     __NR_linux_mincore,            //