diff --git a/packages/spacecat-shared-rum-api-client/src/functions/total-metrics.js b/packages/spacecat-shared-rum-api-client/src/functions/total-metrics.js
index 0a932c15..04428313 100644
--- a/packages/spacecat-shared-rum-api-client/src/functions/total-metrics.js
+++ b/packages/spacecat-shared-rum-api-client/src/functions/total-metrics.js
@@ -21,7 +21,9 @@ function handler(bundles) {
     ? bundle.weight
     : 0));
   const totalPageViews = dataChunks?.totals?.traffic_domain?.weight;
-  const totalCTR = dataChunks?.totals?.ctr?.sum / dataChunks?.totals?.ctr?.weight;
+  const sum = dataChunks?.totals?.ctr?.sum ?? 0;
+  const weight = dataChunks?.totals?.ctr?.weight ?? 0;
+  const totalCTR = weight !== 0 ? sum / weight : 0;
   return {
     totalPageViews,
     totalCTR,
diff --git a/packages/spacecat-shared-rum-api-client/test/total-metrics.test.js b/packages/spacecat-shared-rum-api-client/test/total-metrics.test.js
index 30857b8a..35e69e38 100644
--- a/packages/spacecat-shared-rum-api-client/test/total-metrics.test.js
+++ b/packages/spacecat-shared-rum-api-client/test/total-metrics.test.js
@@ -18,7 +18,7 @@ describe('Total Metrics Queries', () => {
   it('crunches CWV data', async () => {
     const result = totalMetrics.handler(bundlesForUrls.rumBundles);
     expect(result).to.deep.equal({
-      totalCTR: 7303,
+      totalCTR: 0.2027468663384768,
       totalPageViews: 24173,
     });
   });