diff --git a/src/interest.hpp b/src/interest.hpp
index 41e3848..80a1b18 100644
--- a/src/interest.hpp
+++ b/src/interest.hpp
@@ -89,7 +89,7 @@
    */
   template<encoding::Tag TAG>
   size_t
-  wireEncode(EncodingImpl<TAG>& block) const;
+  wireEncode(EncodingImpl<TAG>& encoder) const;
 
   /**
    * @brief Encode to a wire format