--- config_f.h
+++ config_f.h
@@ -64,7 +64,7 @@
  */
 #if defined (SHORT_STRINGS) && defined (NLS) && !defined (WINNT_NATIVE) && !defined(_OSD_POSIX) && SIZEOF_WCHAR_T > 1
 # define WIDE_STRINGS
-# if SIZEOF_WCHAR_T <= 4
+# if SIZEOF_WCHAR_T < 4
 #  define UTF16_STRINGS
 # endif
 #endif