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-rw-r--r--libio/fileops.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/libio/fileops.c b/libio/fileops.c
index c054d5e7d0..29412968db 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -932,8 +932,7 @@ _IO_file_seekoff_mmap (fp, offset, dir, mode)
      using a pushback buffer, but in the usual case has the same value as
      (fp->_IO_read_ptr - fp->_IO_buf_base).  */
   if (mode == 0)
-    return ((fp->_IO_buf_end - fp->_IO_buf_base)
-	    - (fp->_IO_read_end - fp->_IO_read_ptr));
+    return fp->_offset - (fp->_IO_read_end - fp->_IO_read_ptr);
 
   switch (dir)
     {