diff --git a/htroot/PerformanceSearch_p.java b/htroot/PerformanceSearch_p.java
index d53c596a0..35230934f 100644
--- a/htroot/PerformanceSearch_p.java
+++ b/htroot/PerformanceSearch_p.java
@@ -51,7 +51,7 @@ public class PerformanceSearch_p {
                 prop.put("table_" + c + "_event", search.processName.name());
                 prop.put("table_" + c + "_comment", search.comment);
                 prop.putNum("table_" + c + "_count", search.resultCount);
-                prop.putNum("table_" + c + "_delta", event.getTime() - lastt);
+                prop.putNum("table_" + c + "_delta", (c == 0 ? lastt : event.getTime() - lastt));
                 prop.put("table_" + c + "_time", event.getFormattedDate());
                 prop.putNum("table_" + c + "_duration", search.duration);
                 c++;