diff --git a/src/jamidht/namedirectory.cpp b/src/jamidht/namedirectory.cpp
index c6346a01831113797fecee415a963fe9c8832a90..3e273e7911d2495a2dbad1e235762b3e27b8bbaf 100644
--- a/src/jamidht/namedirectory.cpp
+++ b/src/jamidht/namedirectory.cpp
@@ -239,7 +239,7 @@ NameDirectory::lookupName(const std::string& n, LookupCallback cb)
 {
     std::string name {n};
     if (not validateName(name)) {
-        cb(name, Response::invalidResponse);
+        cb("", Response::invalidResponse);
         return;
     }
     toLower(name);