diff --git a/mlir/include/mlir/Dialect/Linalg/IR/LinalgNamedStructuredOps.yaml b/mlir/include/mlir/Dialect/Linalg/IR/LinalgNamedStructuredOps.yaml
--- a/mlir/include/mlir/Dialect/Linalg/IR/LinalgNamedStructuredOps.yaml
+++ b/mlir/include/mlir/Dialect/Linalg/IR/LinalgNamedStructuredOps.yaml
@@ -1,3 +1,4 @@
+# Auto-generated file. Do not edit!
 --- !LinalgOpConfig
 metadata: !LinalgOpMetadata
   name: matmul
diff --git a/mlir/python/mlir/dialects/linalg/opdsl/dump_oplib.py b/mlir/python/mlir/dialects/linalg/opdsl/dump_oplib.py
--- a/mlir/python/mlir/dialects/linalg/opdsl/dump_oplib.py
+++ b/mlir/python/mlir/dialects/linalg/opdsl/dump_oplib.py
@@ -81,6 +81,7 @@
 
   # Print.
   if args.format == "yaml":
+    print("# Auto-generated file. Do not edit!")
     print(yaml_dump_all(configs))
   elif args.format == "repr":
     for config in configs: