diff --git a/perf/modules/plot-summary-sk/plot-summary-sk.ts b/perf/modules/plot-summary-sk/plot-summary-sk.ts
index 43a9e36..5b3c361 100644
--- a/perf/modules/plot-summary-sk/plot-summary-sk.ts
+++ b/perf/modules/plot-summary-sk/plot-summary-sk.ts
@@ -172,6 +172,10 @@
   }
 
   private recomputeRange() {
+    if (!this.currentChartData) {
+      return;
+    }
+
     if (this.isCommitScale) {
       this.commitsStart = this.currentChartData!.start as number;
       this.commitsEnd = this.currentChartData!.end as number;