Sunc with trunk revision 58971.

[reactos.git] / include / ddk / wdm.h

diff --git a/include/ddk/wdm.h b/include/ddk/wdm.h
index 86f90b2..7be0457 100644 (file)
--- a/include/ddk/wdm.h
+++ b/include/ddk/wdm.h
@@ -12603,7 +12603,7 @@ IoBuildDeviceIoControlRequest(
   _Out_opt_ PVOID OutputBuffer,
   _In_ ULONG OutputBufferLength,
   _In_ BOOLEAN InternalDeviceIoControl,
-  _In_ PKEVENT Event,
+  _In_opt_ PKEVENT Event,
   _Out_ PIO_STATUS_BLOCK IoStatusBlock);
 
 _IRQL_requires_max_(DISPATCH_LEVEL)