diff --git a/src/CalcManager/pch.h b/src/CalcManager/pch.h
index 6073de5a..106d28a5 100644
--- a/src/CalcManager/pch.h
+++ b/src/CalcManager/pch.h
@@ -29,14 +29,10 @@
 
 #include <windows.h>
 #include <winerror.h>
-#include <intsafe.h>
 #include <ppltasks.h>
 
 #else
 
-// #include <intsafe.h>
-// #include <ppltasks.h>
-
 #include "winerror_cross_platform.h"
 #include "win_data_types_cross_platform.h"
 #include "sal_cross_platform.h"