diff --git a/org.ntlab.traceAnalyzer/src/org/ntlab/deltaExtractor/DeltaExtractor.java b/org.ntlab.traceAnalyzer/src/org/ntlab/deltaExtractor/DeltaExtractor.java
index 3eeece6..54b2399 100644
--- a/org.ntlab.traceAnalyzer/src/org/ntlab/deltaExtractor/DeltaExtractor.java
+++ b/org.ntlab.traceAnalyzer/src/org/ntlab/deltaExtractor/DeltaExtractor.java
@@ -38,7 +38,7 @@
 	protected static final boolean DEBUG2 = true;
 	protected final IAliasCollector defaultAliasCollector = new IAliasCollector() {
 		@Override
-		public void changeTrackingObject(String from, String to) {
+		public void changeTrackingObject(String from, String to, boolean isSrcSide) {
 		}
 		@Override
 		public void addAlias(Alias alias) {