diff --git a/PerformancePkg/Dp_App/Dp.c b/PerformancePkg/Dp_App/Dp.c
index 4cdc39edb4..484ef2d50b 100644
--- a/PerformancePkg/Dp_App/Dp.c
+++ b/PerformancePkg/Dp_App/Dp.c
@@ -382,7 +382,7 @@ InitializeDp (
   if (CustomCumulativeToken != NULL) {
     CustomCumulativeData = AllocateZeroPool (sizeof (PERF_CUM_DATA));
     ASSERT (CustomCumulativeData != NULL);
-    CustomCumulativeData->MinDur = 0;
+    CustomCumulativeData->MinDur = PERF_MAXDUR;
     CustomCumulativeData->MaxDur = 0;
     CustomCumulativeData->Count  = 0;
     CustomCumulativeData->Duration = 0;