1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index 96e75137ac..7925c7b5e4 100644
--- a/io.c
+++ b/io.c
@@ -4500,7 +4500,7 @@ io_reopen(VALUE io, VALUE nfile)
 	rb_io_binmode(io);
     }
 
-    RBASIC(io)->klass = RBASIC(nfile)->klass;
+    RBASIC(io)->klass = rb_obj_class(nfile);
     return io;
 }