diff --git a/build b/build
index f61018c6..809db781 100755
--- a/build
+++ b/build
@@ -47,10 +47,10 @@ main()
 	roms)
 		if [ $# -gt 1 ] && [ "$2" = "serprog" ]; then
 			mk -b stm32-vserprog pico-serprog
-			return 0
-		fi
-		shift 1
-		x_ ./mk -b coreboot "$@" ;;
+		else
+			shift 1
+			x_ ./mk -b coreboot "$@"
+		fi ;;
 	*)
 		[ -f "$spath" ] || $err "bad command"
 		$shcmd