diff -ruN a/i18n/digitlst.cpp b/i18n/digitlst.cpp
--- a/i18n/digitlst.cpp	2016-10-27 01:37:56.000000000 -0000
+++ b/i18n/digitlst.cpp	2017-09-21 20:39:29.873030393 -0000
@@ -61,11 +61,7 @@
 #endif
 
 #if U_USE_STRTOD_L
-# if U_PLATFORM_USES_ONLY_WIN32_API || U_PLATFORM == U_PF_CYGWIN
-#   include <locale.h>
-# else
-#   include <xlocale.h>
-# endif
+# include <locale.h>
 #endif
 
 // ***************************************************************************