diff --git a/makefiles/tools/cc2538-bsl.inc.mk b/makefiles/tools/cc2538-bsl.inc.mk
index 6b55640338..224b3e58ba 100644
--- a/makefiles/tools/cc2538-bsl.inc.mk
+++ b/makefiles/tools/cc2538-bsl.inc.mk
@@ -1,10 +1,13 @@
 FLASHFILE ?= $(BINFILE)
-FLASHER ?= $(RIOTTOOLS)/cc2538-bsl/cc2538-bsl.py
+CC2538_BSL ?= $(RIOTTOOLS)/cc2538-bsl/cc2538-bsl.py
 FFLAGS_OPTS ?=
 PROG_BAUD ?= 500000	# default value in cc2538-bsl
 
-FFLAGS  = $(if $(IMAGE_OFFSET), -a $(shell printf "0x%08x" $$(($(IMAGE_OFFSET) + $(ROM_START_ADDR)))))
-FFLAGS += -p "$(PROG_DEV)" $(FFLAGS_OPTS) --write-erase -v -b $(PROG_BAUD) $(FLASHFILE)
+CC2538_BSL_FLAGS  = $(if $(IMAGE_OFFSET), -a $(shell printf "0x%08x" $$(($(IMAGE_OFFSET) + $(ROM_START_ADDR)))))
+CC2538_BSL_FLAGS += -p "$(PROG_DEV)" $(FFLAGS_OPTS) --write-erase -v -b $(PROG_BAUD) $(FLASHFILE)
+
+FLASHER ?= $(CC2538_BSL)
+FFLAGS ?= $(CC2538_BSL_FLAGS)
 
 RESET ?= $(FLASHER) -p "$(PROG_DEV)" $(FFLAGS_OPTS) -b $(PROG_BAUD)