diff --git a/tools/kochdocs.nim b/tools/kochdocs.nim
index 9f2ceb2d00..f8ac3cdcb5 100644
--- a/tools/kochdocs.nim
+++ b/tools/kochdocs.nim
@@ -242,6 +242,7 @@ lib/pure/oswalkdir.nim
 lib/pure/collections/heapqueue.nim
 lib/pure/fenv.nim
 lib/std/sha1.nim
+lib/std/sums.nim
 lib/std/varints.nim
 lib/std/time_t.nim
 lib/impure/rdstdin.nim