diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index acdb0e3..dcfc32f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -5,9 +5,6 @@ add_compile_options(
     -Werror=shadow
 )
 
-add_executable(tzdb2nx
-    main.cpp
-    tzif.cpp
-    tzif.h)
-
 include_directories(.)
+
+add_subdirectory(tzdb2nx)
diff --git a/src/tzdb2nx/CMakeLists.txt b/src/tzdb2nx/CMakeLists.txt
new file mode 100644
index 0000000..9d2b034
--- /dev/null
+++ b/src/tzdb2nx/CMakeLists.txt
@@ -0,0 +1,4 @@
+add_executable(tzdb2nx
+    main.cpp
+    tzif.cpp
+    tzif.h)
diff --git a/src/main.cpp b/src/tzdb2nx/main.cpp
similarity index 100%
rename from src/main.cpp
rename to src/tzdb2nx/main.cpp
diff --git a/src/tzif.cpp b/src/tzdb2nx/tzif.cpp
similarity index 100%
rename from src/tzif.cpp
rename to src/tzdb2nx/tzif.cpp
diff --git a/src/tzif.h b/src/tzdb2nx/tzif.h
similarity index 100%
rename from src/tzif.h
rename to src/tzdb2nx/tzif.h