diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index 6835ddf..8ae0f40 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -326,17 +326,17 @@
 	int ret;
 
 	ret = kvm_arm_copy_core_reg_indices(uindices);
-	if (ret)
+	if (ret < 0)
 		return ret;
 	uindices += ret;
 
 	ret = kvm_arm_copy_fw_reg_indices(vcpu, uindices);
-	if (ret)
+	if (ret < 0)
 		return ret;
 	uindices += kvm_arm_get_fw_num_regs(vcpu);
 
 	ret = copy_timer_indices(vcpu, uindices);
-	if (ret)
+	if (ret < 0)
 		return ret;
 	uindices += NUM_TIMER_REGS;