diff --git a/device/types.go b/device/types.go
index 521dc7c0..708b67e7 100644
--- a/device/types.go
+++ b/device/types.go
@@ -680,7 +680,7 @@ type GetRelayOutputs struct {
 }
 
 type GetRelayOutputsResponse struct {
-	RelayOutputs onvif.RelayOutput
+	RelayOutputs []onvif.RelayOutput
 }
 
 type GetDigitalInputs struct {
@@ -688,7 +688,7 @@ type GetDigitalInputs struct {
 }
 
 type GetDigitalInputsResponse struct {
-	DigitalInputs onvif.DigitalInput
+	DigitalInputs []onvif.DigitalInput
 }
 
 type SetRelayOutputSettings struct {