diff --git a/src/armnnSerializer/Serializer.cpp b/src/armnnSerializer/Serializer.cpp
index f475be1..d6a23cc 100644
--- a/src/armnnSerializer/Serializer.cpp
+++ b/src/armnnSerializer/Serializer.cpp
@@ -36,7 +36,7 @@
         m_guidMap.insert(guidPair);
         return m_layerId;
     }
-    return m_layerId;
+    return m_guidMap[guid];
 }
 
 // Build FlatBuffer for Input Layer