diff --git a/hypervisor/arch/x86/lib/retpoline-thunk.S b/hypervisor/arch/x86/lib/retpoline-thunk.S
index 3496e4dd4..44b009d7f 100644
--- a/hypervisor/arch/x86/lib/retpoline-thunk.S
+++ b/hypervisor/arch/x86/lib/retpoline-thunk.S
@@ -12,6 +12,7 @@ __x86_indirect_thunk_\reg:
     call 22f
 11:
     pause
+    lfence
     jmp 11b
 22:
     mov %\reg, (%rsp)