diff --git a/include/grgsm/CMakeLists.txt b/include/grgsm/CMakeLists.txt
index 2f76929..2982ef1 100644
--- a/include/grgsm/CMakeLists.txt
+++ b/include/grgsm/CMakeLists.txt
@@ -37,3 +37,4 @@
 add_subdirectory(qa_utils)
 add_subdirectory(flow_control)
 add_subdirectory(transmitter)
+add_subdirectory(trx)