diff --git a/google/iam/credentials/v1/iamcredentials_gapic.yaml b/google/iam/credentials/v1/iamcredentials_gapic.yaml
index e89b6057..41084883 100644
--- a/google/iam/credentials/v1/iamcredentials_gapic.yaml
+++ b/google/iam/credentials/v1/iamcredentials_gapic.yaml
@@ -123,6 +123,7 @@ interfaces:
     field_name_patterns:
       name: service_account
     timeout_millis: 60000
+    resource_name_treatment: STATIC_TYPES
   - name: GenerateIdentityBindingAccessToken
     flattening:
       groups:
@@ -153,3 +154,6 @@ resource_name_generation:
 - message_name: GenerateIdentityBindingAccessTokenRequest
   field_entity_map:
     name: service_account
+- message_name: SignJwtRequest
+  field_entity_map:
+    name: service_account