diff --git a/ked/device_drivers/max7219/CMakeLists.txt b/ked/device_drivers/max7219/CMakeLists.txt
index 4a2eda0..b23c377 100644
--- a/ked/device_drivers/max7219/CMakeLists.txt
+++ b/ked/device_drivers/max7219/CMakeLists.txt
@@ -1 +1,6 @@
-add_executable(max7219.c max7219.h)
+# https://www.youtube.com/watch?v=abuCXC3t6eQ
+add_library(
+	max7219
+	max7219.c
+	max7219.h
+)