diff --git a/src/Bundle/ChillBudgetBundle/Calculator/CalculatorManager.php b/src/Bundle/ChillBudgetBundle/Calculator/CalculatorManager.php
index a37ac68dc..934c22e36 100644
--- a/src/Bundle/ChillBudgetBundle/Calculator/CalculatorManager.php
+++ b/src/Bundle/ChillBudgetBundle/Calculator/CalculatorManager.php
@@ -29,10 +29,10 @@ class CalculatorManager
 
     public function addCalculator(CalculatorInterface $calculator, bool $default)
     {
-        $this->calculators[$calculator::getAlias()] = $calculator;
+        $this->calculators[$calculator->getAlias()] = $calculator;
 
         if ($default) {
-            $this->defaultCalculator[] = $calculator::getAlias();
+            $this->defaultCalculator[] = $calculator->getAlias();
         }
     }
 
@@ -50,7 +50,7 @@ class CalculatorManager
             $result = $calculator->calculate($elements);
 
             if (null !== $result) {
-                $results[$calculator::getAlias()] = $result;
+                $results[$calculator->getAlias()] = $result;
             }
         }