diff --git a/helper/ccnb-parser/visitors/ccnb-parser-non-negative-integer-visitor.cc b/helper/ccnb-parser/visitors/ccnb-parser-non-negative-integer-visitor.cc
index 319eefa..e393770 100644
--- a/helper/ccnb-parser/visitors/ccnb-parser-non-negative-integer-visitor.cc
+++ b/helper/ccnb-parser/visitors/ccnb-parser-non-negative-integer-visitor.cc
@@ -31,7 +31,7 @@
 NonNegativeIntegerVisitor::visit (Blob &n) //to throw parsing error
 {
   // Buffer n.m_blob;
-  throw CcnxDecodingException ();
+  throw CcnbDecodingException ();
 }
 
 boost::any
@@ -42,7 +42,7 @@
   int32_t value;
   is >> value;
   if (value<0) // value should be non-negative
-    throw CcnxDecodingException ();
+    throw CcnbDecodingException ();
 
   return static_cast<uint32_t> (value);
 }