1 files changed, 1 insertions, 2 deletions
diff --git a/io.c b/io.c
index 43f36888ed..b3c02e99a0 100644
--- a/io.c
+++ b/io.c
@@ -837,8 +837,7 @@ ruby_dup(int orig)
 static VALUE
 io_alloc(VALUE klass)
 {
-    NEWOBJ(io, struct RFile);
-    OBJSETUP(io, klass, T_FILE);
+    NEWOBJ_OF(io, struct RFile, klass, T_FILE);
 
     io->fptr = 0;