diff --git a/grc/CMakeLists.txt b/grc/CMakeLists.txt
index c3646a2..ae06065 100644
--- a/grc/CMakeLists.txt
+++ b/grc/CMakeLists.txt
@@ -24,6 +24,7 @@
 add_subdirectory(flow_control)
 add_subdirectory(misc_utils)
 add_subdirectory(transmitter)
+add_subdirectory(trx)
 install(FILES
     gsm_block_tree.xml DESTINATION share/gnuradio/grc/blocks
 )