diff --git a/srcpkgs/tcl/update b/srcpkgs/tcl/update
new file mode 100644
index 00000000000..4f33de9c3f0
--- /dev/null
+++ b/srcpkgs/tcl/update
@@ -0,0 +1 @@
+pattern="${pkgname}\K[\d\.]+(?=-src\.tar)"