diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/Overview/graphData/GraphData.java b/app/src/main/java/info/nightscout/androidaps/plugins/Overview/graphData/GraphData.java
index 30ed626b89..139aa6e30f 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/Overview/graphData/GraphData.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/Overview/graphData/GraphData.java
@@ -331,6 +331,8 @@ public class GraphData {
     }
 
     private double getNearestBg(long date) {
+        if (bgReadingsArray == null)
+            return Profile.fromMgdlToUnits(100, units);
         for (int r = 0; r < bgReadingsArray.size(); r++) {
             BgReading reading = bgReadingsArray.get(r);
             if (reading.date > date) continue;