diff --git a/channels/rdpsnd/client/ios/rdpsnd_ios.c b/channels/rdpsnd/client/ios/rdpsnd_ios.c
index b8f004f93..4aa8311ce 100644
--- a/channels/rdpsnd/client/ios/rdpsnd_ios.c
+++ b/channels/rdpsnd/client/ios/rdpsnd_ios.c
@@ -144,7 +144,7 @@ static UINT rdpsnd_ios_play(rdpsndDevicePlugin* device, const BYTE* data, size_t
 }
 
 static BOOL rdpsnd_ios_open(rdpsndDevicePlugin* device, const AUDIO_FORMAT* format,
-                            int __unused latency)
+                            UINT32 __unused latency)
 {
 	rdpsndIOSPlugin* p = THIS(device);