diff --git a/boards/nucleo-f091rc/Makefile.include b/boards/nucleo-f091rc/Makefile.include
index 8db8eaed90..d01fb044ac 100644
--- a/boards/nucleo-f091rc/Makefile.include
+++ b/boards/nucleo-f091rc/Makefile.include
@@ -1,2 +1,6 @@
+# nucleo-f091rc can become un-flashable after a hardfault, use connect_assert_srst
+# to always be able to flash or reset the board.
+export OPENOCD_RESET_USE_CONNECT_ASSERT_SRST ?= 1
+
 # load the common Makefile.include for Nucleo boards
 include $(RIOTBOARD)/common/nucleo64/Makefile.include