diff --git a/src/SimCore/Identifier.cpp b/src/SimCore/Identifier.cpp
index 389b51a..af15e69 100644
--- a/src/SimCore/Identifier.cpp
+++ b/src/SimCore/Identifier.cpp
@@ -46,7 +46,7 @@ Identifier::Identifier(std::string str)
 
 std::string Identifier::serialize()
 {
-return std::to_string(parent_) + StringDelimiter + std::to_string(number_) + StringDelimiter + std::to_string(external_);
+return std::to_string(parent_) + StringDelimiter + std::to_string(number_) + StringDelimiter + std::to_string(external_) + StringDelimiter + uuid_;
 
 }