minor fix
diff --git a/binding.gyp b/binding.gyp
index 58587be..eadc86c 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -788,6 +788,7 @@
'src/core/ext/transport/chttp2/transport/bin_encoder.c',
'src/core/ext/transport/chttp2/transport/chttp2_plugin.c',
'src/core/ext/transport/chttp2/transport/chttp2_transport.c',
+ 'src/core/ext/transport/chttp2/transport/flow_control.c',
'src/core/ext/transport/chttp2/transport/frame_data.c',
'src/core/ext/transport/chttp2/transport/frame_goaway.c',
'src/core/ext/transport/chttp2/transport/frame_ping.c',