diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 30d6ce1..f3b601d 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -60,3 +60,7 @@ endif()
 	#FetchContent_MakeAvailable(oatpp)
 #endif()
 
+if (NOT TARGET PureDOOM)
+	add_subdirectory(./pure_doom)
+endif()
+
diff --git a/external/pure_doom/CMakeLists.txt b/external/pure_doom/CMakeLists.txt
new file mode 100644
index 0000000..86e2004
--- /dev/null
+++ b/external/pure_doom/CMakeLists.txt
@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.24 FATAL_ERROR)
+
+add_library(PureDOOM INTERFACE "./PureDOOM/PureDOOM.h")
+target_include_directories(PureDOOM SYSTEM INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}")
+