diff --git a/build/targets.device.mak b/build/targets.device.mak
index 9d1c69e3c..ae7f267af 100644
--- a/build/targets.device.mak
+++ b/build/targets.device.mak
@@ -20,7 +20,7 @@ $(eval $(call rule_for, \
 #TODO: We over-pad here, pad with the the needed amount of bytes only.
 $(eval $(call rule_for, \
   OBJCOPY, %.bin, %.$$(EXE), \
-  $$(OBJCOPY) -O ihex $$< $$@ && printf "\xFF\xFF\xFF\xFF" >> $$@, \
+  $$(OBJCOPY) -O binary $$< $$@ && printf "\xFF\xFF\xFF\xFF" >> $$@, \
   with_local_version \
 ))