diff --git a/platform/cc2538dk/Makefile.cc2538dk b/platform/cc2538dk/Makefile.cc2538dk
index dfce1f375..4dbeb6d03 100644
--- a/platform/cc2538dk/Makefile.cc2538dk
+++ b/platform/cc2538dk/Makefile.cc2538dk
@@ -29,7 +29,7 @@ MODULES += core/net core/net/mac \
            core/net/llsec
 
 PYTHON = python
-BSL_FLAGS += -e -w -v -a $$($(OBJDUMP) -h $*.elf | grep -B1 LOAD | grep -Ev 'LOAD|\-\-' | awk '{print "0x" $$5}' | sort -g | head -1)
+BSL_FLAGS += -e -w -v
 
 ifdef PORT
   BSL_FLAGS += -p $(PORT)
@@ -41,5 +41,8 @@ BSL = $(CONTIKI)/tools/cc2538-bsl/cc2538-bsl.py
 ifeq ($(wildcard $(BSL)), )
 	@echo "ERROR: Could not find the cc2538-bsl script. Did you run 'git submodule update --init' ?"
 else
-	$(PYTHON) $(BSL) $(BSL_FLAGS) $<
+	$(eval BSL_ADDRESS_ARG := -a $(shell $(OBJDUMP) -h $*.elf | grep -B1 LOAD | \
+	                               grep -Ev 'LOAD|\-\-' | awk '{print "0x" $$5}' | \
+	                               sort -g | head -1))
+	$(PYTHON) $(BSL) $(BSL_FLAGS) $(BSL_ADDRESS_ARG) $<
 endif
diff --git a/platform/remote/Makefile.remote b/platform/remote/Makefile.remote
index b91183b1e..a261cb686 100644
--- a/platform/remote/Makefile.remote
+++ b/platform/remote/Makefile.remote
@@ -36,18 +36,14 @@ MODULES += core/net core/net/mac \
            core/net/mac/contikimac \
            core/net/llsec
 
-PYTHON = python
-BSL_FLAGS += -e -w -v -a $$($(OBJDUMP) -h $*.elf | grep -B1 LOAD | grep -Ev 'LOAD|\-\-' | awk '{print "0x" $$5}' | sort -g | head -1)
-
-ifdef PORT
-  BSL_FLAGS += -p $(PORT)
-endif
-
 BSL = $(CONTIKI)/tools/cc2538-bsl/cc2538-bsl.py
 
 %.upload: %.bin %.elf
 ifeq ($(wildcard $(BSL)), )
 	@echo "ERROR: Could not find the cc2538-bsl script. Did you run 'git submodule update --init' ?"
 else
-	$(PYTHON) $(BSL) $(BSL_FLAGS) $<
+	$(eval BSL_ADDRESS_ARG := -a $(shell $(OBJDUMP) -h $*.elf | grep -B1 LOAD | \
+	                               grep -Ev 'LOAD|\-\-' | awk '{print "0x" $$5}' | \
+	                               sort -g | head -1))
+	$(PYTHON) $(BSL) $(BSL_FLAGS) $(BSL_ADDRESS_ARG) $<
 endif