diff --git a/boards/pba-d-01-kw2x/Makefile.include b/boards/pba-d-01-kw2x/Makefile.include
index eb53b2ba84da325da495913f0ab8852392289c55..e5cae31cf55b12750d5b0b9f44ce8e073eefc4f9 100644
--- a/boards/pba-d-01-kw2x/Makefile.include
+++ b/boards/pba-d-01-kw2x/Makefile.include
@@ -6,8 +6,6 @@ export CPU = kinetis
 # cpu if needed.
 export CPU_MODEL ?= mkw21d256vha5
 
-export MCPU = cortex-m4
-
 # set default port depending on operating system
 PORT_LINUX ?= /dev/ttyACM0
 PORT_DARWIN ?= $(firstword $(sort $(wildcard /dev/tty.usbmodem*)))