diff --git a/src/main/java/com/nhn/hippo/web/calltree/server/Histogram.java b/src/main/java/com/nhn/hippo/web/calltree/server/Histogram.java
index 5b90c9f28..72129775d 100644
--- a/src/main/java/com/nhn/hippo/web/calltree/server/Histogram.java
+++ b/src/main/java/com/nhn/hippo/web/calltree/server/Histogram.java
@@ -11,7 +11,7 @@ public class Histogram {
 
 	private int min = 0;
 	private int max = 0;
-	private int sampleCount = 0;
+	private int sampleCount = 1;
 
 	public Histogram(int resolution) {
 		this.resolution = resolution;