diff --git a/src/atom/mod.rs b/src/atom/mod.rs
index cee9c29..8cffa06 100644
--- a/src/atom/mod.rs
+++ b/src/atom/mod.rs
@@ -540,6 +540,10 @@ impl fmt::Display for Version {
             write!(f, "-r{rev}")?;
         }
 
+        if let Some(build_id) = self.build_id.as_ref() {
+            write!(f, "-{build_id}")?;
+        }
+
         Ok(())
     }
 }