diff --git a/CMakeLists.txt b/CMakeLists.txt
index b4d6407fa..5f5799b8e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -199,7 +199,6 @@ check_cxx_symbol_exists(vasprintf stdio.h HAVE_VASPRINTF)
 include(CheckIncludeFileCXX)
 include(CheckIncludeFilesCXX)
 CHECK_INCLUDE_FILE_CXX(io.h HAVE_IO_H)
-CHECK_INCLUDE_FILE_CXX(locale.h HAVE_LOCALE_H)
 CHECK_INCLUDE_FILE_CXX(share.h HAVE_SHARE_H)
 CHECK_INCLUDE_FILE_CXX(signal.h HAVE_SIGNAL_H)
 CHECK_INCLUDE_FILE_CXX(stdint.h HAVE_STDINT_H)
diff --git a/src/config/C4Config.cpp b/src/config/C4Config.cpp
index 95a5da55f..ed44d42ea 100644
--- a/src/config/C4Config.cpp
+++ b/src/config/C4Config.cpp
@@ -33,9 +33,6 @@
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
-#ifdef HAVE_LOCALE_H
-#include <clocale>
-#endif
 
 #ifdef USE_CONSOLE
 #define DONCOFF 0