diff --git a/nrf5/boards/pca10040/mpconfigboard_s132.mk b/nrf5/boards/pca10040/mpconfigboard_s132.mk
index 090a08b4b6..c0bdd5b3ca 100644
--- a/nrf5/boards/pca10040/mpconfigboard_s132.mk
+++ b/nrf5/boards/pca10040/mpconfigboard_s132.mk
@@ -1,4 +1,6 @@
 MCU_SERIES = m4
 MCU_VARIANT = nrf52
+MCU_SUB_VARIANT = nrf52832
 LD_FILE = boards/nrf52832_aa_s132.ld
 
+NRF_DEFINES += -DNRF52832_XXAA
diff --git a/nrf5/boards/pca10040/mpconfigboard_s1xx.mk b/nrf5/boards/pca10040/mpconfigboard_s1xx.mk
index 81727fe5de..5bfeca122c 100644
--- a/nrf5/boards/pca10040/mpconfigboard_s1xx.mk
+++ b/nrf5/boards/pca10040/mpconfigboard_s1xx.mk
@@ -1,4 +1,6 @@
 MCU_SERIES = m4
 MCU_VARIANT = nrf52
+MCU_SUB_VARIANT = nrf52832
 LD_FILE = boards/nrf52832_aa_s1xx.ld
 
+NRF_DEFINES += -DNRF52832_XXAA