diff --git a/src/org/ntlab/deltaExtractor/Alias.java b/src/org/ntlab/deltaExtractor/Alias.java
index 054ecba..f62d75a 100644
--- a/src/org/ntlab/deltaExtractor/Alias.java
+++ b/src/org/ntlab/deltaExtractor/Alias.java
@@ -94,6 +94,10 @@
 		}
 	}
 	
+	public void setObjectId(String objectId) {
+		this.objectId = objectId;
+	}
+	
 	@Override
 	public int hashCode() {
 		final int prime = 31;