diff --git a/src/modules/_Stdio/buffer.cmod b/src/modules/_Stdio/buffer.cmod
index c5c634f0a25f3f92a4ba1783af38ec5907c2675b..34a8e01983b47f840eec695a8b8cef7aa689b312 100644
--- a/src/modules/_Stdio/buffer.cmod
+++ b/src/modules/_Stdio/buffer.cmod
@@ -2854,7 +2854,6 @@ PIKECLASS Buffer
 
   EXIT {
     Buffer *io = THIS;
-    io->this = 0;
     io_unlink_external_storage( io );
     if( io->error_mode )
         free_program( io->error_mode );