diff --git a/boards/relaycard.mk b/boards/relaycard.mk
index 53f5f57..0520009 100644
--- a/boards/relaycard.mk
+++ b/boards/relaycard.mk
@@ -1,5 +1,3 @@
 include boards/nano.mk
 
-ifndef PROG
-PROG = relaycard
-endif
+PROG ?= relaycard