diff --git a/framework/base/helper.class.php b/framework/base/helper.class.php
index 85ea3e744a..42f8a7c702 100644
--- a/framework/base/helper.class.php
+++ b/framework/base/helper.class.php
@@ -1340,7 +1340,7 @@ function getEnvData($name, $default = '', $format = 'string')
         case 'float':
             return (float)$value;
         case 'bool':
-            return $value == 'true' || $value == '1';
+            return (bool)filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
         default:
             return (string)$value;
     }