diff --git a/Resources/config/schema/monolog-1.0.xsd b/Resources/config/schema/monolog-1.0.xsd
index 6c23e93a..471cc539 100644
--- a/Resources/config/schema/monolog-1.0.xsd
+++ b/Resources/config/schema/monolog-1.0.xsd
@@ -189,8 +189,8 @@
     </xsd:complexType>
 
     <xsd:complexType name="headers">
-        <xsd:choice minOccurs="0" maxOccurs="unbounded">
-            <xsd:element name="header" type="xsd:string" />
-        </xsd:choice>
+        <xsd:sequence>
+            <xsd:element name="header" type="xsd:string" minOccurs="0" maxOccurs="unbounded" />
+        </xsd:sequence>
     </xsd:complexType>
 </xsd:schema>