diff --git a/src/meta-info.hpp b/src/meta-info.hpp
index e88c870..798acd1 100644
--- a/src/meta-info.hpp
+++ b/src/meta-info.hpp
@@ -76,7 +76,7 @@
 
   template<encoding::Tag TAG>
   size_t
-  wireEncode(EncodingImpl<TAG>& block) const;
+  wireEncode(EncodingImpl<TAG>& encoder) const;
 
   const Block&
   wireEncode() const;