diff --git a/cmd/dfu.c b/cmd/dfu.c
index c9ba062..91a750a 100644
--- a/cmd/dfu.c
+++ b/cmd/dfu.c
@@ -27,8 +27,10 @@
 #ifdef CONFIG_DFU_OVER_USB
 	char *usb_controller = argv[1];
 #endif
+#if defined(CONFIG_DFU_OVER_USB) || defined(CONFIG_DFU_OVER_TFTP)
 	char *interface = argv[2];
 	char *devstring = argv[3];
+#endif
 
 	int ret = 0;
 #ifdef CONFIG_DFU_OVER_TFTP
@@ -63,6 +65,7 @@
 
 U_BOOT_CMD(dfu, CONFIG_SYS_MAXARGS, 1, do_dfu,
 	"Device Firmware Upgrade",
+	""
 #ifdef CONFIG_DFU_OVER_USB
 	"<USB_controller> <interface> <dev> [list]\n"
 	"  - device firmware upgrade via <USB_controller>\n"