diff --git a/delay-arm.c b/delay-lpc.c
similarity index 100%
rename from delay-arm.c
rename to delay-lpc.c
diff --git a/delay.c b/delay.c
index 99f7d9e..9efa622 100644
--- a/delay.c
+++ b/delay.c
@@ -6,7 +6,8 @@
 
 #define TEACUP_C_INCLUDE
 #include "delay-avr.c"
-#include "delay-arm.c"
+// Each ARM needs it's own file
+#include "delay-lpc.c"
 #undef TEACUP_C_INCLUDE
 
 #include "watchdog.h"