diff --git a/litex_boards/prog/openocd_butterstick.cfg b/litex_boards/prog/openocd_butterstick.cfg
index 88d49cf..38352fc 100644
--- a/litex_boards/prog/openocd_butterstick.cfg
+++ b/litex_boards/prog/openocd_butterstick.cfg
@@ -6,4 +6,5 @@ reset_config none
 
 adapter_khz 25000
 
-jtag newtap ecp5 tap -irlen 8 -expected-id 0x81113043
+set _CHIPNAME ecp5
+jtag newtap $_CHIPNAME tap -irlen 8 -expected-id 0x81113043
\ No newline at end of file