diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 0f9d7fa27894c1..e3eba64419c782 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6788,6 +6788,7 @@ static int kvm_pv_clock_pairing(struct kvm_vcpu *vcpu, gpa_t paddr,
 	clock_pairing.nsec = ts.tv_nsec;
 	clock_pairing.tsc = kvm_read_l1_tsc(vcpu, cycle);
 	clock_pairing.flags = 0;
+	memset(&clock_pairing.pad, 0, sizeof(clock_pairing.pad));
 
 	ret = 0;
 	if (kvm_write_guest(vcpu->kvm, paddr, &clock_pairing,