diff --git a/ndn-cpp/c/Interest.h b/ndn-cpp/c/Interest.h
index 36d873b..a007f1a 100644
--- a/ndn-cpp/c/Interest.h
+++ b/ndn-cpp/c/Interest.h
@@ -33,12 +33,14 @@
   self->maxSuffixComponents = -1;
 	self->minSuffixComponents = -1;
 	self->publisherPublicKeyDigest = 0;
+	self->publisherPublicKeyDigestLength = 0;
 	// TODO: implement exclude
 	self->childSelector = -1;
 	self->answerOriginKind = -1;
 	self->scope = -1;
 	self->interestLifetime = -1;
-	self->nonce = 0; /**< length of nonce */
+	self->nonce = 0;
+	self->nonceLength = 0;
 }
 
 #ifdef	__cplusplus