diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java
index 43962dd13..b61513847 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java
@@ -509,7 +509,7 @@ public abstract class AbstractChartFragment extends AbstractGBFragment {
                         }
                         activityEntries.add(createLineEntry(value, ts));
                 }
-                if (hr && isValidHeartRateValue(sample.getHeartRate())) {
+                if (hr && sample.getKind() != ActivityKind.TYPE_NOT_WORN && isValidHeartRateValue(sample.getHeartRate())) {
                     if (lastHrSampleIndex > -1 && ts - lastHrSampleIndex > 1800*HeartRateUtils.MAX_HR_MEASUREMENTS_GAP_MINUTES) {
                         heartrateEntries.add(createLineEntry(0, lastHrSampleIndex + 1));
                         heartrateEntries.add(createLineEntry(0, ts - 1));