diff --git a/helper/ccnb-parser/syntax-tree/ccnb-parser-dtag.cc b/helper/ccnb-parser/syntax-tree/ccnb-parser-dtag.cc
index 0fdea06..68fc794 100644
--- a/helper/ccnb-parser/syntax-tree/ccnb-parser-dtag.cc
+++ b/helper/ccnb-parser/syntax-tree/ccnb-parser-dtag.cc
@@ -41,7 +41,7 @@
     return; // hack #1. Do not process nesting block for <Content>
   
   // parse attributes until first nested block reached
-  while (!start.IsEnd () && start.PeekU8 ()!=CCN_CLOSE)
+  while (!start.IsEnd () && BufferIteratorPeekU8 (start)!=CCN_CLOSE)
     {
       Ptr<Block> block = Block::ParseBlock (start);
       if (DynamicCast<BaseAttr> (block)!=0)
@@ -54,7 +54,7 @@
 	}
 
   // parse the rest of nested blocks
-  while (!start.IsEnd () && start.PeekU8 ()!=CCN_CLOSE)
+  while (!start.IsEnd () && BufferIteratorPeekU8 (start)!=CCN_CLOSE)
     {
       // hack #2. Stop processing nested blocks if last block was <Content>
       if (m_dtag == CCN_DTAG_ContentObject && // we are in <ContentObject>