diff --git a/lib/php/Makefile.am b/lib/php/Makefile.am
index d374cbc..fdb8558 100755
--- a/lib/php/Makefile.am
+++ b/lib/php/Makefile.am
@@ -53,6 +53,7 @@
   lib/Thrift/Factory/TCompactProtocolFactory.php \
   lib/Thrift/Factory/TJSONProtocolFactory.php \
   lib/Thrift/Factory/TProtocolFactory.php \
+  lib/Thrift/Factory/TStringFuncFactory.php \
   lib/Thrift/Factory/TTransportFactory.php
 
 phpprotocoldir = $(phpdir)/Protocol