diff --git a/identity/WritableCredential.h b/identity/WritableCredential.h
index 8b5e19e..eb63aca 100644
--- a/identity/WritableCredential.h
+++ b/identity/WritableCredential.h
@@ -50,10 +50,15 @@
   private:
     string dataPath_;
     string credentialName_;
+    string docType_;
     size_t dataChunkSize_;
     sp<IWritableIdentityCredential> halBinder_;
     vector<uint8_t> attestationCertificate_;
 
+    ssize_t calcExpectedProofOfProvisioningSize(
+        const vector<AccessControlProfileParcel>& accessControlProfiles,
+        const vector<EntryNamespaceParcel>& entryNamespaces);
+
     Status ensureAttestationCertificateExists(const vector<uint8_t>& challenge);
 };