diff --git a/boards/common/stm32f103c8/Makefile.include b/boards/common/stm32f103c8/Makefile.include
index 087851a95c..da91db4ef7 100644
--- a/boards/common/stm32f103c8/Makefile.include
+++ b/boards/common/stm32f103c8/Makefile.include
@@ -25,7 +25,7 @@ ifeq ($(PROGRAMMER),dfu-util)
   export ROM_OFFSET ?= 0x2000 # Skip the space needed by the embedded bootloader
   FLASHER = dfu-util
   DEBUGGER = # no debugger
-  RESET = # dfu-util has no support for resetting the device
+  RESET ?= # dfu-util has no support for resetting the device
 
   HEXFILE = $(BINFILE)
   FFLAGS = -d 1eaf:0003 -a 2 -D "$(HEXFILE)"