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 fea3a32774..e9fa8f0207 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
@@ -70,6 +70,8 @@ import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.util.DateTimeUtils;
 import nodomain.freeyourgadget.gadgetbridge.util.DeviceHelper;
 
+import static nodomain.freeyourgadget.gadgetbridge.activities.HeartRateUtils.isValidHeartRateValue;
+
 /**
  * A base class fragment to be used with ChartsActivity. The fragment can supply
  * a title to be displayed in the activity by returning non-null in #getTitle()
@@ -510,7 +512,7 @@ public abstract class AbstractChartFragment extends AbstractGBFragment {
                         }
                         activityEntries.add(createLineEntry(value, ts));
                 }
-                if (hr && sample.getKind() != ActivityKind.TYPE_NOT_WORN && isValidHeartRateValue(sample.getHeartRate())) {
+                if (hr && sample.getKind() != ActivityKind.TYPE_NOT_WORN && HeartRateUtils.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));