diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 683345a121b73ddf08ad692e8a38df7d9a20a21e..6c8460308548ac237d1d67c65c3a3c8b81b0eca7 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -834,7 +834,7 @@ static int apic_mmio_write(struct kvm_io_device *this,
 	if (len != 4 || (offset & 0xf)) {
 		/* Don't shout loud, $infamous_os would cause only noise. */
 		apic_debug("apic write: bad size=%d %lx\n", len, (long)address);
-		return;
+		return 0;
 	}
 
 	val = *(u32*)data;