diff --git a/boards/common/slwstk6000b/Makefile.features b/boards/common/slwstk6000b/Makefile.features
index 69f83b7559..a32588dc27 100644
--- a/boards/common/slwstk6000b/Makefile.features
+++ b/boards/common/slwstk6000b/Makefile.features
@@ -1,5 +1,14 @@
 CPU = efm32
-# TODO move CPU_MODEL here based on the daughter board
+
+# The radio board connected to the slwstk6000b mainboard
+BOARD_MODULE = $(word 2, $(subst -, ,$(BOARD)))
+
+include $(RIOTBOARD)/common/slwstk6000b/slwstk6000b.info.mk
+CPU_MODEL = $(word 1, $(SLWSTK6000B_MAINBOARD_VARS_$(BOARD_MODULE)))
+
+ifeq (,$(CPU_MODEL))
+  $(error $(BOARD_MODULE) can not be used with slwstk600b mainboard)
+endif
 
 # Put defined MCU peripherals here (in alphabetical order)
 FEATURES_PROVIDED += periph_adc
diff --git a/boards/slwstk6000b-slwrb4150a/Makefile.features b/boards/slwstk6000b-slwrb4150a/Makefile.features
index 4890267050..d536aa382b 100644
--- a/boards/slwstk6000b-slwrb4150a/Makefile.features
+++ b/boards/slwstk6000b-slwrb4150a/Makefile.features
@@ -1,4 +1,2 @@
-# HACK this should be deduced from the daughter board in 'common/slwstk6000b'
 CPU_FAM = efr32mg1p
-CPU_MODEL = efr32mg1p233f256gm48
 include $(RIOTBOARD)/common/slwstk6000b/Makefile.features
diff --git a/boards/slwstk6000b-slwrb4162a/Makefile.features b/boards/slwstk6000b-slwrb4162a/Makefile.features
index 756fd27081..df1fefe402 100644
--- a/boards/slwstk6000b-slwrb4162a/Makefile.features
+++ b/boards/slwstk6000b-slwrb4162a/Makefile.features
@@ -1,4 +1,2 @@
-# HACK this should be deduced from the daughter board in 'common/slwstk6000b'
 CPU_FAM = efr32mg12p
-CPU_MODEL = efr32mg12p332f1024gl125
 include $(RIOTBOARD)/common/slwstk6000b/Makefile.features