diff --git a/board/bmw/ns16550.h b/board/bmw/ns16550.h
index 210aea4..8aa251d 100644
--- a/board/bmw/ns16550.h
+++ b/board/bmw/ns16550.h
@@ -1,6 +1,6 @@
 /*
  * NS16550 Serial Port
- * originally from linux source (arch/ppc/boot/ns16550.h)
+ * originally from linux source (arch/powerpc/boot/ns16550.h)
  * modified slightly to
  * have addresses as offsets from CONFIG_SYS_ISA_BASE
  * added a few more definitions