diff --git a/lib/php/lib/Thrift/Protocol/TProtocolDecorator.php b/lib/php/lib/Thrift/Protocol/TProtocolDecorator.php
index a3067ec..4f1746c 100644
--- a/lib/php/lib/Thrift/Protocol/TProtocolDecorator.php
+++ b/lib/php/lib/Thrift/Protocol/TProtocolDecorator.php
@@ -219,7 +219,7 @@
 
     public function readMapBegin(&$keyType, &$valType, &$size)
     {
-        $this->concreteProtocol_->readFieldEnd($keyType, $valType, $size);
+        $this->concreteProtocol_->readMapBegin($keyType, $valType, $size);
     }
 
     public function readMapEnd()