diff --git a/CMakeLists.txt b/CMakeLists.txt
index d1539fd..d64396a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,3 +18,4 @@ add_compile_options(-Wall
       )
 
 add_subdirectory(iso7816)
+add_subdirectory(osmo-gtm900)