diff --git a/plugins/win-wasapi/enum-wasapi.cpp b/plugins/win-wasapi/enum-wasapi.cpp
index d0ddc45e5cce65984cf1ebe9ff736ce384b5ae6c..79a295ef1cb9cefdd2bf449fd4313bde1c446344 100644
--- a/plugins/win-wasapi/enum-wasapi.cpp
+++ b/plugins/win-wasapi/enum-wasapi.cpp
@@ -45,12 +45,12 @@ void GetWASAPIAudioDevices_(vector<AudioDeviceInfo> &devices, bool input)
 	res = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL,
 			__uuidof(IMMDeviceEnumerator),
 			(void**)enumerator.Assign());
-	if (!res)
+	if (FAILED(res))
 		throw HRError("Failed to create enumerator", res);
 
 	res = enumerator->EnumAudioEndpoints(input ? eCapture : eRender,
 			DEVICE_STATE_ACTIVE, collection.Assign());
-	if (!res)
+	if (FAILED(res))
 		throw HRError("Failed to enumerate devices", res);
 
 	res = collection->GetCount(&count);