diff --git a/schema/field/internal/numeric.tmpl b/schema/field/internal/numeric.tmpl
index a26478a0a..b424924cc 100644
--- a/schema/field/internal/numeric.tmpl
+++ b/schema/field/internal/numeric.tmpl
@@ -3,6 +3,8 @@
 // This source code is licensed under the Apache 2.0 license found
 // in the LICENSE file in the root directory of this source tree.
 
+// Code generated by internal/numeric.tmpl, DO NOT EDIT.
+
 package field
 
 import (
diff --git a/schema/field/numeric.go b/schema/field/numeric.go
index 4d38ab1c0..b69d3eacd 100644
--- a/schema/field/numeric.go
+++ b/schema/field/numeric.go
@@ -2,6 +2,8 @@
 // This source code is licensed under the Apache 2.0 license found
 // in the LICENSE file in the root directory of this source tree.
 
+// Code generated by internal/numeric.tmpl, DO NOT EDIT.
+
 package field
 
 import (