diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/pump/medtronic/data/dto/BatteryStatusDTO.java b/app/src/main/java/info/nightscout/androidaps/plugins/pump/medtronic/data/dto/BatteryStatusDTO.java
index d12260bb75..c8bd2347d0 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/pump/medtronic/data/dto/BatteryStatusDTO.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/pump/medtronic/data/dto/BatteryStatusDTO.java
@@ -27,6 +27,9 @@ public class BatteryStatusDTO {
 
         int percentInt = (int) (percent * 100.0d);
 
+        if (percentInt<0)
+            percentInt = 1;
+
         if (percentInt > 100)
             percentInt = 100;