diff --git a/Verbraucher_extern/module.php b/Verbraucher_extern/module.php
index 78f4ac5..cea3453 100644
--- a/Verbraucher_extern/module.php
+++ b/Verbraucher_extern/module.php
@@ -97,7 +97,7 @@ class Verbraucher_extern extends IPSModule
              }
              for ($i = $startIndex; $i < count($values); $i++) {
                  $currentCombination[] = $values[$i];
-                 if (findCombinationRecursive($power - $values[$i], $values, $currentCombination, $i + 1, $result)) {
+                 if ($this->findCombinationRecursive($power - $values[$i], $values, $currentCombination, $i + 1, $result)) {
                      return true;
                  }
                  array_pop($currentCombination);