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-rw-r--r--libc/stdio/stdio.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/libc/stdio/stdio.c b/libc/stdio/stdio.c
index 0baedcdf3..73b9d1aee 100644
--- a/libc/stdio/stdio.c
+++ b/libc/stdio/stdio.c
@@ -790,7 +790,8 @@ void _free_stdio_stream(FILE *fp)
/* Note: we generally won't bother checking for bad pointers here. */
if ((fp >= _stdio_streams) && (fp < _stdio_streams + FIXED_STREAMS)) {
- assert( (fp - _stdio_streams) % sizeof(_stdio_streams[0]) == 0 );
+ assert( (fp - _stdio_streams) % ((_stdio_streams+1) -_stdio_streams)
+ == 0 );
fp->next = _free_file_list;
_free_file_list = fp;
return;