diff --git a/srcpkgs/bk/update b/srcpkgs/bk/update
index 735d29ad7f..b56f076e0a 100644
--- a/srcpkgs/bk/update
+++ b/srcpkgs/bk/update
@@ -1,2 +1,2 @@
 site='http://www.bitkeeper.org/downloads/latest/'
-pattern='bk-[\d.]+'
+pattern='bk-\K[\d.]+'