diff --git a/hw/kvm/apic.c b/hw/kvm/apic.c
index 8ba4079025..80e3e48333 100644
--- a/hw/kvm/apic.c
+++ b/hw/kvm/apic.c
@@ -30,7 +30,7 @@ void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic)
     APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d);
     int i;
 
-    memset(kapic, 0, sizeof(kapic));
+    memset(kapic, 0, sizeof(*kapic));
     kvm_apic_set_reg(kapic, 0x2, s->id << 24);
     kvm_apic_set_reg(kapic, 0x8, s->tpr);
     kvm_apic_set_reg(kapic, 0xd, s->log_dest << 24);