diff --git a/changes/bug29244 b/changes/bug29244
new file mode 100644
index 0000000000000000000000000000000000000000..6206a9546358215b281e864492c9b74f05afac47
--- /dev/null
+++ b/changes/bug29244
@@ -0,0 +1,4 @@
+  o Minor bugfixes (build, compatibility):
+    - Update Cargo.lock file to match the version made by the latest
+      version of Rust, so that "make distcheck" will pass again.
+      Fixes bug 29244; bugfix on 0.3.3.4-alpha.
diff --git a/src/rust/Cargo.lock b/src/rust/Cargo.lock
index 7d6a6635c5cd05f6afa42bf13c015349b17b8844..e2f24b0af73250a704e75c99ad1d3c0e4368c8a0 100644
--- a/src/rust/Cargo.lock
+++ b/src/rust/Cargo.lock
@@ -1,3 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
 [[package]]
 name = "crypto"
 version = "0.0.1"