diff --git a/src/reuse/comment.py b/src/reuse/comment.py
index aa6b63f3e..9a19ef61f 100644
--- a/src/reuse/comment.py
+++ b/src/reuse/comment.py
@@ -831,6 +831,7 @@ class XQueryCommentStyle(CommentStyle):
     ".yarnrc": PythonCommentStyle,
     "ansible.cfg": PythonCommentStyle,
     "archive.sctxar": UncommentableCommentStyle,  # SuperCollider global archive
+    "Cargo.lock": UncommentableCommentStyle,
     "CMakeLists.txt": PythonCommentStyle,
     "CODEOWNERS": PythonCommentStyle,
     "configure.ac": M4CommentStyle,