1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index e6c873604d..083c8e952c 100644
--- a/io.c
+++ b/io.c
@@ -2329,7 +2329,7 @@ rb_io_reopen(argc, argv, file)
 
 static VALUE
 rb_io_become(clone, io)
-    VALUE io;
+    VALUE clone, io;
 {
     OpenFile *fptr, *orig;
     int fd;