diff --git a/lib/decoding/osmocom/gsm/CMakeLists.txt b/lib/decoding/osmocom/gsm/CMakeLists.txt
new file mode 100644
index 0000000..945d1c2
--- /dev/null
+++ b/lib/decoding/osmocom/gsm/CMakeLists.txt
@@ -0,0 +1,6 @@
+add_sources(
+a5.c
+auth_core.c
+gsm48_ie.c
+kasumi.c
+)