diff --git a/cpu/k60/Makefile.include b/cpu/k60/Makefile.include
index 7864add13..3cf85d2df 100644
--- a/cpu/k60/Makefile.include
+++ b/cpu/k60/Makefile.include
@@ -9,12 +9,6 @@ export KINETIS_COMMON = $(RIOTCPU)/kinetis_common/
 # CPU depends on the kinetis module, so include it
 include $(KINETIS_COMMON)Makefile.include
 
-#export the CPU model and architecture
-MODEL = $(shell echo $(CPU_MODEL)|tr 'a-z' 'A-Z')
-export CFLAGS += -DCPU_MODEL_$(MODEL)
-ARCH = $(shell echo $(CPU_ARCH) | tr 'a-z-' 'A-Z_')
-export CFLAGS += -DCPU_ARCH_$(ARCH)
-
 # this CPU implementation is using kinetis common startup
 export COMMON_STARTUP = $(KINETIS_COMMON)
 
diff --git a/cpu/k64f/Makefile.include b/cpu/k64f/Makefile.include
index 1ef70e697..fff4af6a8 100644
--- a/cpu/k64f/Makefile.include
+++ b/cpu/k64f/Makefile.include
@@ -9,12 +9,6 @@ export KINETIS_COMMON = $(RIOTCPU)/kinetis_common/
 # CPU depends on the kinetis module, so include it
 include $(KINETIS_COMMON)Makefile.include
 
-#export the CPU model
-MODEL = $(shell echo $(CPU_MODEL)|tr 'a-z' 'A-Z')
-export CFLAGS += -DCPU_MODEL_$(MODEL)
-ARCH = $(shell echo $(CPU_ARCH) | tr 'a-z-' 'A-Z_')
-export CFLAGS += -DCPU_ARCH_$(ARCH)
-
 # this CPU implementation is using kinetis common startup
 export COMMON_STARTUP = $(KINETIS_COMMON)
 
diff --git a/cpu/kw2x/Makefile.include b/cpu/kw2x/Makefile.include
index e194a2124..9a931c989 100644
--- a/cpu/kw2x/Makefile.include
+++ b/cpu/kw2x/Makefile.include
@@ -9,12 +9,6 @@ export KINETIS_COMMON = $(RIOTCPU)/kinetis_common/
 # CPU depends on the kinetis module, so include it
 include $(KINETIS_COMMON)Makefile.include
 
-#export the CPU model
-MODEL = $(shell echo $(CPU_MODEL)|tr 'a-z' 'A-Z')
-export CFLAGS += -DCPU_MODEL_$(MODEL)
-ARCH = $(shell echo $(CPU_ARCH) | tr 'a-z-' 'A-Z_')
-export CFLAGS += -DCPU_ARCH_$(ARCH)
-
 # this CPU implementation is using kinetis common startup
 export COMMON_STARTUP = $(KINETIS_COMMON)