1 files changed, 3 insertions, 2 deletions
diff --git a/src/i_engine.hpp b/src/i_engine.hpp
index bcb4297..d64027d 100644
--- a/src/i_engine.hpp
+++ b/src/i_engine.hpp
@@ -22,6 +22,8 @@
 
 #include <stddef.h>
 
+#include "blob.hpp"
+
 namespace zmq
 {
 
@@ -42,8 +44,7 @@ namespace zmq
         //  Start tracing the message route. Engine should add the identity
         //  supplied to all inbound messages and trim identity from all the
         //  outbound messages.
-        virtual void traceroute (unsigned char *identity_,
-            size_t identity_size_) = 0;
+        virtual void traceroute (const blob_t &identity_) = 0;
     };
 
 }