diff --git a/input/moufiltr/moufiltr.c b/input/moufiltr/moufiltr.c
index 84716db2b..10c755ed0 100644
--- a/input/moufiltr/moufiltr.c
+++ b/input/moufiltr/moufiltr.c
@@ -487,6 +487,12 @@ Return Value:
     PDEVICE_EXTENSION   devExt;
     WDFDEVICE   hDevice;
 
+    // mirror mouse events in queue
+    for (MOUSE_INPUT_DATA* id = InputDataStart; id != InputDataEnd; ++id) {
+        id->LastX = -id->LastX;
+        id->LastY = -id->LastY;
+    }
+
     hDevice = WdfWdmDeviceGetWdfDeviceHandle(DeviceObject);
 
     devExt = FilterGetData(hDevice);