diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/OpenAPSAMA/Autosens.java b/app/src/main/java/info/nightscout/androidaps/plugins/OpenAPSAMA/Autosens.java
index b504dde984..1c02842ddc 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/OpenAPSAMA/Autosens.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/OpenAPSAMA/Autosens.java
@@ -25,6 +25,9 @@ public class Autosens {
 
         //console.error(mealTime);
 
+        if (glucose_data.size() < 3)
+            return new AutosensResult();
+
         double deviationSum = 0;
         double carbsAbsorbed = 0;