diff --git a/api/proto/buf-legacy.yaml b/api/proto/buf-legacy.yaml
index 7a2db93335bea..f458acb516663 100644
--- a/api/proto/buf-legacy.yaml
+++ b/api/proto/buf-legacy.yaml
@@ -28,4 +28,4 @@ lint:
     - RPC_RESPONSE_STANDARD_NAME
 breaking:
   use:
-    - FILE
+    - "buf-legacy.yaml should not be used for buf breaking"
diff --git a/api/proto/buf.yaml b/api/proto/buf.yaml
index 1004465f1db11..f8fce60da5f57 100644
--- a/api/proto/buf.yaml
+++ b/api/proto/buf.yaml
@@ -56,3 +56,4 @@ lint:
 breaking:
   use:
     - WIRE_JSON
+    - ENUM_VALUE_NO_DELETE
diff --git a/proto/buf.yaml b/proto/buf.yaml
index 77a2e3adc57fa..ce83dded55f07 100644
--- a/proto/buf.yaml
+++ b/proto/buf.yaml
@@ -45,3 +45,4 @@ lint:
 breaking:
   use:
     - WIRE_JSON
+    - ENUM_VALUE_NO_DELETE