diff --git a/reactos/drivers/input/i8042prt/i8042prt.c b/reactos/drivers/input/i8042prt/i8042prt.c
index 4e44967996b..b0ddcabcfb9 100644
--- a/reactos/drivers/input/i8042prt/i8042prt.c
+++ b/reactos/drivers/input/i8042prt/i8042prt.c
@@ -517,11 +517,11 @@ static NTSTATUS STDCALL I8042BasicDetect(PDEVICE_EXTENSION DevExt)
 	DevExt->MouseExists = FALSE;
 	DevExt->KeyboardExists = FALSE;
 
-	I8042Flush();
-
 	if (!I8042Write(DevExt, I8042_DATA_PORT, 0x74))
 		return STATUS_TIMEOUT;
 
+	I8042Flush();
+
 	if (!I8042Write(DevExt, I8042_CTRL_PORT, KBD_SELF_TEST))
 		return STATUS_TIMEOUT;