diff --git a/include/ddk/tdikrnl.h b/include/ddk/tdikrnl.h
index ef55f4ab93b..b0f05dd0752 100644
--- a/include/ddk/tdikrnl.h
+++ b/include/ddk/tdikrnl.h
@@ -577,7 +577,7 @@ TdiDefaultSendPossibleHandler(
   IrpSubFunction, DeviceObject,           \
   FileObject, Event, IoStatusBlock)       \
   IoBuildDeviceIoControlRequest(          \
-		0x00000003, DeviceObject,             \
+		IrpSubFunction, DeviceObject,             \
 		NULL, 0, NULL, 0,                     \
 		TRUE, Event, IoStatusBlock)