1 files changed, 1 insertions, 1 deletions
diff --git a/object.c b/object.c
index 2dc87610da..1585b87feb 100644
--- a/object.c
+++ b/object.c
@@ -808,7 +808,7 @@ nil_to_f(VALUE obj)
 static VALUE
 nil_to_s(VALUE obj)
 {
-    return rb_str_new(0, 0);
+    return rb_usascii_str_new(0, 0);
 }
 
 /*