diff --git a/app/src/main/java/com/simplemobiletools/calculator/MyWidgetProvider.java b/app/src/main/java/com/simplemobiletools/calculator/MyWidgetProvider.java
index 2af7e51..762b658 100644
--- a/app/src/main/java/com/simplemobiletools/calculator/MyWidgetProvider.java
+++ b/app/src/main/java/com/simplemobiletools/calculator/MyWidgetProvider.java
@@ -218,6 +218,7 @@ public class MyWidgetProvider extends AppWidgetProvider implements Calculator {
     @Override
     public void onDeleted(Context context, int[] appWidgetIds) {
         super.onDeleted(context, appWidgetIds);
-        updateWidgetIds();
+        if (cxt != null)
+            updateWidgetIds();
     }
 }