diff --git a/Resources/config/schema/doctrine-1.0.xsd b/Resources/config/schema/doctrine-1.0.xsd
index 1d1dcac09..bb56bb608 100644
--- a/Resources/config/schema/doctrine-1.0.xsd
+++ b/Resources/config/schema/doctrine-1.0.xsd
@@ -164,6 +164,7 @@
 
         <xsd:attribute name="type" type="xsd:string" />
         <xsd:attribute name="id" type="xsd:string" />
+        <xsd:attribute name="pool" type="xsd:string" />
         <xsd:attribute name="namespace" type="xsd:string" />
     </xsd:complexType>