diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index c1b22d4eef5..1a2cba528f8 100755
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -349,7 +349,6 @@ endif( MINGW )
 
 if( MSVC )
   set(error_t int)
-  set(mode_t "unsigned short")
   set(LTDL_SHLIBPATH_VAR "PATH")
   set(LTDL_SYSSEARCHPATH "")
   set(LTDL_DLOPEN_DEPLIBS 1)
diff --git a/include/llvm/Config/config.h.cmake b/include/llvm/Config/config.h.cmake
index 755daa6dc37..d07e0b2e610 100644
--- a/include/llvm/Config/config.h.cmake
+++ b/include/llvm/Config/config.h.cmake
@@ -686,9 +686,6 @@
    `char[]'. */
 #undef YYTEXT_POINTER
 
-/* Define to a type to use for `mode_t' if it is not otherwise available. */
-#cmakedefine mode_t ${mode_t}
-
 /* Define to a function replacing strtoll */
 #cmakedefine strtoll ${strtoll}