diff --git a/Source/cmStandardIncludes.h b/Source/cmStandardIncludes.h
index a9796b975..468a58908 100644
--- a/Source/cmStandardIncludes.h
+++ b/Source/cmStandardIncludes.h
@@ -33,14 +33,6 @@
 // Provide fixed-size integer types.
 #include <cmIML/INT.h>
 
-// Include stream compatibility layer from KWSys.
-// This is needed to work with large file support
-// on some platforms whose stream operators do not
-// support the large integer types.
-#if defined(CMAKE_BUILD_WITH_CMAKE)
-# include <cmsys/IOStream.hxx>
-#endif
-
 #include <fstream>
 #include <iostream>
 #include <iomanip>