diff --git a/src/board/system76/common/common.mk b/src/board/system76/common/common.mk
index d1ba778..7f271f2 100644
--- a/src/board/system76/common/common.mk
+++ b/src/board/system76/common/common.mk
@@ -4,6 +4,8 @@ SRC+=$(wildcard $(SYSTEM76_COMMON_DIR)/*.c)
 INCLUDE+=$(wildcard $(SYSTEM76_COMMON_DIR)/include/common/*.h) $(SYSTEM76_COMMON_DIR)/common.mk
 CFLAGS+=-I$(SYSTEM76_COMMON_DIR)/include
 
+PROGRAMMER=$(wildcard /dev/serial/by-id/usb-Arduino*)
+
 # Add scratch ROM
 include $(SYSTEM76_COMMON_DIR)/scratch/scratch.mk
 
@@ -12,8 +14,9 @@ console_internal:
 	sudo tool/target/release/system76_ectool console
 
 console_external:
-	sleep 1 && echo C | sudo tee /dev/ttyACM* &
-	sudo tio -b 1000000 -m INLCRNL -t /dev/ttyACM*
+	test -c "$(PROGRAMMER)"
+	sleep 1 && echo C | sudo tee "$(PROGRAMMER)" &
+	sudo tio -b 1000000 -m INLCRNL -t "$(PROGRAMMER)"
 
 flash_internal: $(BUILD)/ec.rom
 	cargo build --manifest-path tool/Cargo.toml --release