diff --git a/Civi/DataProcessor/FieldOutputHandler/ConditionallyMapStrings.php b/Civi/DataProcessor/FieldOutputHandler/ConditionallyMapStrings.php
index 3831e5dac68b0adc265162c8c16533fe51d1396e..802753700c94a5b20503ca108c199728664d2ea8 100644
--- a/Civi/DataProcessor/FieldOutputHandler/ConditionallyMapStrings.php
+++ b/Civi/DataProcessor/FieldOutputHandler/ConditionallyMapStrings.php
@@ -34,19 +34,20 @@ class ConditionallyMapStrings extends AbstractSimpleFieldOutputHandler {
     // set the default values
     if (isset($field['configuration'])) {
       $configuration = $field['configuration'];
+      $defaults = array();
       for ($i = 1; $i < $this->dataFields; ++$i) {
         if (isset($configuration["condition_{$i}"])) {
-          $this->defaults["condition_{$i}"] = $configuration["condition_{$i}"];
+          $defaults["condition_{$i}"] = $configuration["condition_{$i}"];
         }
         if (isset($configuration["replacement_{$i}"])) {
-          $this->defaults["replacement_{$i}"] = $configuration["replacement_{$i}"];
+          $defaults["replacement_{$i}"] = $configuration["replacement_{$i}"];
         }
       }
       if (isset($configuration['default'])) {
-        $this->defaults['default'] = $configuration['default'];
+        $defaults['default'] = $configuration['default'];
       }
 
-      $form->setDefaults($this->defaults);
+      $form->setDefaults($defaults);
     }
   }