diff --git a/src/arch/x86/linux/syscall_tbl64.cc b/src/arch/x86/linux/syscall_tbl64.cc
index 1e7274cc42..26299d884b 100644
--- a/src/arch/x86/linux/syscall_tbl64.cc
+++ b/src/arch/x86/linux/syscall_tbl64.cc
@@ -194,10 +194,10 @@ SyscallDescTable<EmuLinux::SyscallABI64> EmuLinux::syscallDescs64 = {
     { 148, "sched_rr_get_interval" },
     { 149, "mlock" },
     { 150, "munlock" },
-    { 151, "mlockall" },
+    { 151, "mlockall", ignoreFunc },
     { 152, "munlockall" },
     { 153, "vhangup" },
-    { 154, "modify_ldt" },
+    { 154, "modify_ldt", ignoreFunc },
     { 155, "pivot_root" },
     { 156, "_sysctl" },
     { 157, "prctl", ignoreFunc },