diff --git a/extruder/Extruder.pde b/extruder/Extruder.pde
new file mode 100644
index 0000000..1c3f190
--- /dev/null
+++ b/extruder/Extruder.pde
@@ -0,0 +1,4 @@
+
+/*
+	The existence of this file makes sources buildable with the Arduino IDE.
+*/