diff --git a/targets/stm32l432/bootloader/main.c b/targets/stm32l432/bootloader/main.c
index a6103c3..c3bf736 100644
--- a/targets/stm32l432/bootloader/main.c
+++ b/targets/stm32l432/bootloader/main.c
@@ -83,6 +83,8 @@ int main()
     init_debug_uart();
 #endif
 
+    device_init_button();
+
     printf1(TAG_GEN,"init device\n");
 
     t1 = millis();
diff --git a/targets/stm32l432/build/bootloader.mk b/targets/stm32l432/build/bootloader.mk
index bf6edd8..4fa4513 100644
--- a/targets/stm32l432/build/bootloader.mk
+++ b/targets/stm32l432/build/bootloader.mk
@@ -3,7 +3,7 @@ include build/common.mk
 # ST related
 SRC = bootloader/main.c bootloader/bootloader.c
 SRC += src/init.c src/redirect.c src/flash.c src/rng.c src/led.c src/device.c
-SRC += src/fifo.c src/crypto.c src/attestation.c
+SRC += src/fifo.c src/crypto.c src/attestation.c src/sense.c
 SRC += src/startup_stm32l432xx.s src/system_stm32l4xx.c
 SRC += $(DRIVER_LIBS) $(USB_LIB)