diff --git a/tests/test-encode-decode-data.cpp b/tests/test-encode-decode-data.cpp
index 6b10104..e8311cf 100644
--- a/tests/test-encode-decode-data.cpp
+++ b/tests/test-encode-decode-data.cpp
@@ -109,7 +109,7 @@
        << (data.getSignature().getSignature().size() > 0 ? toHex(data.getSignature().getSignature()).c_str() : "<none>") << endl;
   cout << "signature.publisherPublicKeyDigest: "
        << (data.getSignature().getPublisherPublicKeyDigest().getPublisherPublicKeyDigest().size() > 0 ? 
-           toHex(data.getSignature().getPublisherPublicKeyDigest().getPublisherPublicKeyDigest()).c_str() : "<none>") << endl;
+           toHex(*data.getSignature().getPublisherPublicKeyDigest().getPublisherPublicKeyDigest()).c_str() : "<none>") << endl;
   cout << "signature.keyLocator: ";
   if ((int)data.getSignature().getKeyLocator().getType() >= 0) {
     if (data.getSignature().getKeyLocator().getType() == ndn_KeyLocatorType_KEY)