diff --git a/aip/general/0161.md b/aip/general/0161.md
index b628edd66c..dd62537af1 100644
--- a/aip/general/0161.md
+++ b/aip/general/0161.md
@@ -28,7 +28,8 @@ common on Update requests (AIP-134).
 Field masks **must** always be relative to the resource:
 
 **Warning:** Read masks as a single field on the request message, for
-example: `google.protobuf.FieldMask read_mask` are **DEPRECATED**.
+example: `google.protobuf.FieldMask read_mask` are **DEPRECATED**. Instead, see
+AIP-157.
 
 ```proto
 message UpdateBookRequest {