diff --git a/src/Client/src/main/java/greenify/client/controller/CalculatorController.java b/src/Client/src/main/java/greenify/client/controller/CalculatorController.java
index 74ed99f..ae837c2 100644
--- a/src/Client/src/main/java/greenify/client/controller/CalculatorController.java
+++ b/src/Client/src/main/java/greenify/client/controller/CalculatorController.java
@@ -14,6 +14,7 @@ import javafx.beans.value.ObservableValue;
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
 import javafx.scene.Node;
+import javafx.scene.control.Alert;
 import javafx.scene.control.Button;
 import javafx.scene.control.CheckBox;
 import javafx.scene.control.Label;