diff --git a/backend/genesys/fwd.h b/backend/genesys/fwd.h
index 9937654d0..5d341b870 100644
--- a/backend/genesys/fwd.h
+++ b/backend/genesys/fwd.h
@@ -59,7 +59,7 @@ struct Pixel;
 struct RawPixel;
 
 // low.h
-struct UsbDeviceEntry;
+class UsbDeviceEntry;
 
 // motor.h
 struct Genesys_Motor;