diff --git a/org.ntlab.traceAnalyzer/src/org/ntlab/objectGraphAnalyzer/ObjectCallCounter.java b/org.ntlab.traceAnalyzer/src/org/ntlab/objectGraphAnalyzer/ObjectCallCounter.java
index f7be5d8..03b5e86 100644
--- a/org.ntlab.traceAnalyzer/src/org/ntlab/objectGraphAnalyzer/ObjectCallCounter.java
+++ b/org.ntlab.traceAnalyzer/src/org/ntlab/objectGraphAnalyzer/ObjectCallCounter.java
@@ -100,7 +100,7 @@
 					if (rootOf.get(srcObjId) == null) {
 						rootOf.put(srcObjId, srcObjId);
 						depthOf.put(srcObjId, 0);
-						classNames.put(srcObjId, srcObjId);
+						classNames.put(srcObjId, c.getThisClassName());
 					}
 					if (rootOf.get(dstObjId) == null) {
 						rootOf.put(dstObjId, dstObjId);