1 files changed, 1 insertions, 0 deletions
diff --git a/io.c b/io.c
index ec16438ffd..f6ea3a1154 100644
--- a/io.c
+++ b/io.c
@@ -741,6 +741,7 @@ rb_io_eof(io)
 	ungetc(ch, fptr->f);
 	return Qfalse;
     }
+    rb_io_check_closed(fptr);
     clearerr(fptr->f);
     return Qtrue;
 }