diff --git a/contrib/test_Gx/CMakeLists.txt b/contrib/test_Gx/CMakeLists.txt
new file mode 100644
index 0000000..c9b0283
--- /dev/null
+++ b/contrib/test_Gx/CMakeLists.txt
@@ -0,0 +1,13 @@
+# The dict_nasreq extension
+PROJECT("Gx Interface for freediameter" C)
+
+# Compile as a module
+FD_ADD_EXTENSION(app_gx main_gx.c)
+
+
+####
+## INSTALL section ##
+
+INSTALL(TARGETS app_gx 
+       LIBRARY DESTINATION ${INSTALL_EXTENSIONS_SUFFIX}
+       COMPONENT freeDiameter-rx-interface)