Index: ruby.c
===================================================================
--- ruby.c	(revision 42491)
+++ ruby.c	(working copy)
@@ -1456,6 +1456,15 @@
     ruby_set_argv(argc, argv);
     process_sflag(&opt->sflag);
 
+    {
+	long i;
+	VALUE load_path = GET_VM()->load_path;
+	for (i = 0; i < RARRAY_LEN(load_path); ++i) {
+	    RARRAY_ASET(load_path, i,
+			rb_str_encode_ospath(RARRAY_AREF(load_path, i)));
+	}
+	}
+
     toplevel_binding = rb_const_get(rb_cObject, rb_intern("TOPLEVEL_BINDING"));
 
 #define PREPARE_PARSE_MAIN(expr) do { \