diff --git a/go/ql/lib/change-notes/2026-01-28-shared-basic-block-library.md b/go/ql/lib/change-notes/2026-01-28-shared-basic-block-library.md
new file mode 100644
index 00000000000..ec795f8ff93
--- /dev/null
+++ b/go/ql/lib/change-notes/2026-01-28-shared-basic-block-library.md
@@ -0,0 +1,4 @@
+---
+category: breaking
+---
+* The `BasicBlock` class is now defined using the shared basic blocks library. `BasicBlock.getRoot` has been replaced by `BasicBlock.getScope`. `BasicBlock.getAPrededecessor` and `BasicBlock.getASuccessor` now take a `SuccessorType` argument. `ReachableJoinBlock.inDominanceFrontierOf` has been removed, so use `BasicBlock.inDominanceFrontier` instead, swapping the receiver and the argument.