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-rw-r--r--libio/iofwide.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/libio/iofwide.c b/libio/iofwide.c
index aa314fe671..88d2d5e563 100644
--- a/libio/iofwide.c
+++ b/libio/iofwide.c
@@ -201,6 +201,12 @@ _IO_fwide (fp, mode)
 
       /* From now on use the wide character callback functions.  */
       ((struct _IO_FILE_plus *) fp)->vtable = fp->_wide_data->_wide_vtable;
+
+      /* One last twist: we get the current stream position.  The wide
+	 char streams have much more problems with not knowing the
+	 current position and so we should disable the optimization
+	 which allows the functions without knowing the position.  */
+      fp->_offset = _IO_SYSSEEK (fp, 0, 0);
     }
 
   /* Set the mode now.  */