diff --git a/Source/CPack/cpack.cxx b/Source/CPack/cpack.cxx
index c57028ddd..0173361ce 100644
--- a/Source/CPack/cpack.cxx
+++ b/Source/CPack/cpack.cxx
@@ -26,7 +26,6 @@
 #include <cmsys/CommandLineArguments.hxx>
 #include <cmsys/SystemTools.hxx>
 #include <cmsys/Encoding.hxx>
-#include <locale.h>
 
 //----------------------------------------------------------------------------
 static const char * cmDocumentationName[][2] =
@@ -101,7 +100,6 @@ int cpackDefinitionArgument(const char* argument, const char* cValue,
 // this is CPack.
 int main (int argc, char const* const* argv)
 {
-  setlocale(LC_CTYPE, "");
   cmsys::Encoding::CommandLineArguments args =
     cmsys::Encoding::CommandLineArguments::Main(argc, argv);
   argc = args.argc();
diff --git a/Source/CursesDialog/ccmake.cxx b/Source/CursesDialog/ccmake.cxx
index 28f3d9b78..3d92a2dfd 100644
--- a/Source/CursesDialog/ccmake.cxx
+++ b/Source/CursesDialog/ccmake.cxx
@@ -16,7 +16,6 @@
 
 #include <signal.h>
 #include <sys/ioctl.h>
-#include <locale.h>
 
 #include "cmCursesMainForm.h"
 #include "cmCursesStandardIncludes.h"
@@ -95,8 +94,6 @@ void CMakeMessageHandler(const char* message, const char* title, bool&,
 
 int main(int argc, char const* const* argv)
 {
-  setlocale(LC_CTYPE, "");
-
   cmsys::Encoding::CommandLineArguments encoding_args =
     cmsys::Encoding::CommandLineArguments::Main(argc, argv);
   argc = encoding_args.argc();
diff --git a/Source/cmakemain.cxx b/Source/cmakemain.cxx
index 61b175e13..e825f1f1f 100644
--- a/Source/cmakemain.cxx
+++ b/Source/cmakemain.cxx
@@ -25,7 +25,6 @@
 #include "cmLocalGenerator.h"
 #include "cmMakefile.h"
 #include <cmsys/Encoding.hxx>
-#include <locale.h>
 
 #ifdef CMAKE_BUILD_WITH_CMAKE
 //----------------------------------------------------------------------------
@@ -175,7 +174,6 @@ static void cmakemainProgressCallback(const char *m, float prog,
 
 int main(int ac, char const* const* av)
 {
-  setlocale(LC_CTYPE, "");
   cmsys::Encoding::CommandLineArguments args =
     cmsys::Encoding::CommandLineArguments::Main(ac, av);
   ac = args.argc();
diff --git a/Source/ctest.cxx b/Source/ctest.cxx
index fb97af606..3fe31cab1 100644
--- a/Source/ctest.cxx
+++ b/Source/ctest.cxx
@@ -19,7 +19,6 @@
 #include "CTest/cmCTestScriptHandler.h"
 #include "CTest/cmCTestLaunch.h"
 #include "cmsys/Encoding.hxx"
-#include <locale.h>
 
 //----------------------------------------------------------------------------
 static const char * cmDocumentationName[][2] =
@@ -117,8 +116,6 @@ static const char * cmDocumentationOptions[][2] =
 // this is a test driver program for cmCTest.
 int main (int argc, char const* const* argv)
 {
-  setlocale(LC_CTYPE, "");
-
   cmsys::Encoding::CommandLineArguments encoding_args =
     cmsys::Encoding::CommandLineArguments::Main(argc, argv);
   argc = encoding_args.argc();
diff --git a/Tests/CTestTestMemcheck/memtester.cxx.in b/Tests/CTestTestMemcheck/memtester.cxx.in
index 43c0ba7a1..c018e0862 100644
--- a/Tests/CTestTestMemcheck/memtester.cxx.in
+++ b/Tests/CTestTestMemcheck/memtester.cxx.in
@@ -1,14 +1,12 @@
 #include <cmSystemTools.h>
 #include <cmsys/Encoding.hxx>
 #include <string>
-#include <locale.h>
 
 #define RETVAL @_retval@
 
 int
 main(int ac, char **av)
 {
-  setlocale(LC_CTYPE, "");
   cmsys::Encoding::CommandLineArguments args =
     cmsys::Encoding::CommandLineArguments::Main(ac, av);
   int argc = args.argc();