diff --git a/src/app/item-detail/request-stats/request-stats-compare.component.ts b/src/app/item-detail/request-stats/request-stats-compare.component.ts
index 5cc51c89..e5190994 100644
--- a/src/app/item-detail/request-stats/request-stats-compare.component.ts
+++ b/src/app/item-detail/request-stats/request-stats-compare.component.ts
@@ -318,6 +318,9 @@ export class RequestStatsCompareComponent implements OnInit, OnDestroy {
   }
 
   calculateApdex(satisfaction, toleration, samples) {
+    if (satisfaction === null || toleration === null) {
+      return
+    }
     const apdexValue = roundNumberTwoDecimals((satisfaction + (toleration * 0.5)) / samples)
     return this.apdexScore(apdexValue)
   }