1 files changed, 1 insertions, 0 deletions
diff --git a/mrblib/io.rb b/mrblib/io.rb
index 8408aea87..0b10c82aa 100644
--- a/mrblib/io.rb
+++ b/mrblib/io.rb
@@ -133,6 +133,7 @@ class IO
   end
 
   def eof?
+    _check_readable
     begin
       buf = _read_buf
       return buf.size == 0