1 files changed, 3 insertions, 2 deletions
diff --git a/google/ads/googleads/v1/services/keyword_plan_idea_service.proto b/google/ads/googleads/v1/services/keyword_plan_idea_service.proto
index 99aeb0328..2e9beedfe 100644
--- a/google/ads/googleads/v1/services/keyword_plan_idea_service.proto
+++ b/google/ads/googleads/v1/services/keyword_plan_idea_service.proto
@@ -19,6 +19,7 @@ package google.ads.googleads.v1.services;
 import "google/ads/googleads/v1/common/keyword_plan_common.proto";
 import "google/ads/googleads/v1/enums/keyword_plan_network.proto";
 import "google/api/annotations.proto";
+import "google/api/field_behavior.proto";
 import "google/protobuf/wrappers.proto";
 import "google/api/client.proto";
 
@@ -51,9 +52,9 @@ message GenerateKeywordIdeasRequest {
   // The ID of the customer with the recommendation.
   string customer_id = 1;
 
-  // The resource name of the language to target.
+  // Required. The resource name of the language to target.
   // Required
-  google.protobuf.StringValue language = 7;
+  google.protobuf.StringValue language = 7 [(google.api.field_behavior) = REQUIRED];
 
   // The resource names of the location to target.
   // Max 10