diff --git a/sys/amd64/vmm/x86.c b/sys/amd64/vmm/x86.c
index 525e1d9b912f..61d99d502ac2 100644
--- a/sys/amd64/vmm/x86.c
+++ b/sys/amd64/vmm/x86.c
@@ -176,6 +176,9 @@ x86_emulate_cpuid(struct vm *vm, int vcpu_id,
 			/* Don't advertise the OS visible workaround feature */
 			regs[2] &= ~AMDID2_OSVW;
 
+			/* Hide mwaitx/monitorx capability from the guest */
+			regs[2] &= ~AMDID2_MWAITX;
+
 			/*
 			 * Hide rdtscp/ia32_tsc_aux until we know how
 			 * to deal with them.