# HG changeset patch
# Parent 52f68c95e02532b5887bdfc9a52ff1c5f82258c2
diff --git a/Modules/readline.c b/Modules/readline.c
--- a/Modules/readline.c
+++ b/Modules/readline.c
@@ -1067,7 +1067,7 @@
     char *saved_locale = strdup(setlocale(LC_CTYPE, NULL));
     if (!saved_locale)
         Py_FatalError("not enough memory to save locale");
-    setlocale(LC_CTYPE, "");
+    setlocale(LC_CTYPE, "C");
 #endif
 
     if (sys_stdin != rl_instream || sys_stdout != rl_outstream) {