diff --git a/public/app/features/alerting/unified/components/rules/RuleDetails.tsx b/public/app/features/alerting/unified/components/rules/RuleDetails.tsx
index f1c272cc3a4..f050919c331 100644
--- a/public/app/features/alerting/unified/components/rules/RuleDetails.tsx
+++ b/public/app/features/alerting/unified/components/rules/RuleDetails.tsx
@@ -142,7 +142,7 @@ const EvaluationBehaviorSummary = ({ rule }: EvaluationBehaviorSummaryProps) =>
             content={`${lastEvaluationDuration}s`}
             theme="info"
           >
-            <span>{Time({ timeInMs: lastEvaluationDuration * 1000, humanize: true })}</span>
+            <span>{Time({ timeInMs: lastEvaluationDuration, humanize: true })}</span>
           </Tooltip>
         </DetailsField>
       )}