--- /dev/null
+++ Libc/Libc-763.13/stdio/FreeBSD/ftell.c.patch
@@ -0,0 +1,11 @@
+--- ftell.c.bsdnew	2009-11-11 13:33:10.000000000 -0800
++++ ftell.c	2009-11-11 13:33:10.000000000 -0800
+@@ -101,6 +101,8 @@ _ftello(fp, offset)
+ 	 * Find offset of underlying I/O object, then
+ 	 * adjust for buffered bytes.
+ 	 */
++	if (__sflush(fp))		/* may adjust seek offset on append stream */
++		return (1);
+ 	if (fp->_flags & __SOFF)
+ 		pos = fp->_offset;
+ 	else {