diff --git a/security/secretkeeper/aidl/aidl_api/android.hardware.security.secretkeeper/current/android/hardware/security/secretkeeper/SecretId.aidl b/security/secretkeeper/aidl/aidl_api/android.hardware.security.secretkeeper/current/android/hardware/security/secretkeeper/SecretId.aidl
index 87d0233d03..9887066512 100644
--- a/security/secretkeeper/aidl/aidl_api/android.hardware.security.secretkeeper/current/android/hardware/security/secretkeeper/SecretId.aidl
+++ b/security/secretkeeper/aidl/aidl_api/android.hardware.security.secretkeeper/current/android/hardware/security/secretkeeper/SecretId.aidl
@@ -35,5 +35,5 @@ package android.hardware.security.secretkeeper;
 /* @hide */
 @VintfStability
 parcelable SecretId {
-  byte[] id;
+  byte[64] id;
 }
diff --git a/security/secretkeeper/aidl/android/hardware/security/secretkeeper/SecretId.aidl b/security/secretkeeper/aidl/android/hardware/security/secretkeeper/SecretId.aidl
index bd982e7c69..b17917f2b5 100644
--- a/security/secretkeeper/aidl/android/hardware/security/secretkeeper/SecretId.aidl
+++ b/security/secretkeeper/aidl/android/hardware/security/secretkeeper/SecretId.aidl
@@ -25,5 +25,5 @@ parcelable SecretId {
     /**
      * 64-byte identifier for a secret.
      */
-    byte[] id;
+    byte[64] id;
 }
diff --git a/security/secretkeeper/aidl/vts/secretkeeper_test_client.rs b/security/secretkeeper/aidl/vts/secretkeeper_test_client.rs
index 5d1306afaf..994f581c27 100644
--- a/security/secretkeeper/aidl/vts/secretkeeper_test_client.rs
+++ b/security/secretkeeper/aidl/vts/secretkeeper_test_client.rs
@@ -233,7 +233,7 @@ impl SkClient {
     fn delete(&self, ids: &[&Id]) {
         let ids: Vec<SecretId> = ids
             .iter()
-            .map(|id| SecretId { id: id.0.to_vec() })
+            .map(|id| SecretId { id: id.0 })
             .collect();
         self.sk.deleteIds(&ids).unwrap();
     }