diff --git a/Chapter05/src/buildings.rs b/Chapter05/src/buildings.rs
index 14708fe..bba1ab3 100644
--- a/Chapter05/src/buildings.rs
+++ b/Chapter05/src/buildings.rs
@@ -62,7 +62,7 @@ impl Building for Building1 {
    }
    fn serialize(&self) -> u64
    {
-      2
+      1
    }
 }