diff --git a/sdk/update.go b/sdk/update.go
index 81f3672..f20f1d6 100644
--- a/sdk/update.go
+++ b/sdk/update.go
@@ -2217,8 +2217,8 @@
 			continue
 		}
 
-		// Ignore fields whose value should be kept.
-		if proptools.HasTag(field, "sdk", "keep") {
+		// Ignore fields tagged with sdk:"ignore".
+		if proptools.HasTag(field, "sdk", "ignore") {
 			continue
 		}