diff --git a/lib/php/Makefile.am b/lib/php/Makefile.am
index 23208d9..c7cd106 100644
--- a/lib/php/Makefile.am
+++ b/lib/php/Makefile.am
@@ -7,7 +7,8 @@
 transport_SCRIPTS = src/transport/TTransport.php \
                     src/transport/TBufferedTransport.php \
                     src/transport/TChunkedTransport.php \
-                    src/transport/TSocket.php
+                    src/transport/TSocket.php \
+                    src/transport/TSocketPool.php
 
 thriftdir = $(prefix)/php/thrift