diff --git a/core/metamodel.class.php b/core/metamodel.class.php
index da9706c38..44aa17d15 100644
--- a/core/metamodel.class.php
+++ b/core/metamodel.class.php
@@ -2488,7 +2488,10 @@ abstract class MetaModel
 				{
 					$aScalarArgs[$sArgName] = null;
 				}
-				// otherwise... could be an array coming from the extra params...
+				elseif (is_array($value))
+				{
+					$aScalarArgs[$sArgName] = $value;
+				}
 			}
 		}
 		// Add standard magic arguments
diff --git a/core/oql/expression.class.inc.php b/core/oql/expression.class.inc.php
index b8f664200..7768ec428 100644
--- a/core/oql/expression.class.inc.php
+++ b/core/oql/expression.class.inc.php
@@ -648,7 +648,12 @@ class VariableExpression extends UnaryExpression
 		}
 		elseif (array_key_exists($this->m_sName, $aArgs))
 		{
-			return CMDBSource::Quote($aArgs[$this->m_sName]);
+			$res = CMDBSource::Quote($aArgs[$this->m_sName]);
+			if (is_array($res))
+			{
+				$res = implode(', ', $res);
+			}
+			return $res;
 		}
 		elseif (($iPos = strpos($this->m_sName, '->')) !== false)
 		{