diff --git a/common/command.c b/common/command.c
index cf8d969f..a18eb780 100644
--- a/common/command.c
+++ b/common/command.c
@@ -34,14 +34,14 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "mousekey.h"
 #endif
 
-#ifdef HOST_PJRC
+#ifdef PROTOCOL_PJRC
 #   include "usb_keyboard.h"
 #   ifdef EXTRAKEY_ENABLE
 #       include "usb_extra.h"
 #   endif
 #endif
 
-#ifdef HOST_VUSB
+#ifdef PROTOCOL_VUSB
 #   include "usbdrv.h"
 #endif
 
@@ -238,7 +238,7 @@ static bool command_common(uint8_t code)
         case KC_S:
             print("\n\n----- Status -----\n");
             print_val_hex8(host_keyboard_leds());
-#ifdef HOST_PJRC
+#ifdef PROTOCOL_PJRC
             print_val_hex8(UDCON);
             print_val_hex8(UDIEN);
             print_val_hex8(UDINT);
@@ -248,7 +248,7 @@ static bool command_common(uint8_t code)
             print_val_hex8(usb_keyboard_idle_count);
 #endif
 
-#ifdef HOST_VUSB
+#ifdef PROTOCOL_PJRC
 #   if USB_COUNT_SOF
             print_val_hex8(usbSofCount);
 #   endif
@@ -267,7 +267,7 @@ static bool command_common(uint8_t code)
 #ifdef EXTRAKEY_ENABLE
         case KC_PSCREEN:
             // TODO: Power key should take this feature? otherwise any key during suspend.
-#ifdef HOST_PJRC
+#ifdef PROTOCOL_PJRC
             if (suspend && remote_wakeup) {
                 usb_remote_wakeup();
             } else {
diff --git a/common/report.h b/common/report.h
index 0995189b..48010276 100644
--- a/common/report.h
+++ b/common/report.h
@@ -71,7 +71,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
 /* key report size(NKRO or boot mode) */
-#if defined(HOST_PJRC)
+#if defined(PROTOCOL_PJRC)
 #   include "usb.h"
 #   if defined(KBD2_REPORT_KEYS) && KBD2_REPORT_KEYS > KBD_REPORT_KEYS
 #       define REPORT_KEYS KBD2_REPORT_KEYS
diff --git a/protocol/iwrap.mk b/protocol/iwrap.mk
index 9c83075a..96aa4140 100644
--- a/protocol/iwrap.mk
+++ b/protocol/iwrap.mk
@@ -1,6 +1,6 @@
 IWRAP_DIR = protocol/iwrap
 
-OPT_DEFS += -DHOST_IWRAP
+OPT_DEFS += -DPROTOCOL_IWRAP
 
 SRC +=	$(IWRAP_DIR)/iwrap.c \
 	$(IWRAP_DIR)/suart.S \
diff --git a/protocol/iwrap/main.c b/protocol/iwrap/main.c
index 05a67337..ac83280f 100644
--- a/protocol/iwrap/main.c
+++ b/protocol/iwrap/main.c
@@ -26,7 +26,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "matrix.h"
 #include "host.h"
 #include "iwrap.h"
-#ifdef HOST_VUSB
+#ifdef PROTOCOL_VUSB
 #   include "vusb.h"
 #   include "usbdrv.h"
 #endif
@@ -78,7 +78,7 @@ static void pullup_pins(void)
 */
 
 
-#ifdef HOST_VUSB
+#ifdef PROTOCOL_VUSB
 static void disable_vusb(void)
 {
     // disable interrupt & disconnect to prevent host from enumerating
@@ -131,7 +131,7 @@ int main(void)
     //pullup_pins();
     //set_prr();
 
-#ifdef HOST_VUSB
+#ifdef PROTOCOL_VUSB
     disable_vusb();
 #endif
     uart_init(115200);
@@ -159,12 +159,12 @@ int main(void)
 
     last_timer = timer_read();
     while (true) {
-#ifdef HOST_VUSB
+#ifdef PROTOCOL_VUSB
         if (host_get_driver() == vusb_driver())
             usbPoll();
 #endif
         keyboard_task();
-#ifdef HOST_VUSB
+#ifdef PROTOCOL_VUSB
         if (host_get_driver() == vusb_driver())
             vusb_transfer_keyboard();
 #endif
@@ -258,7 +258,7 @@ static uint8_t console_command(uint8_t c)
             print("r: reset. software reset by watchdog\n");
             print("i: insomniac. prevent KB from sleeping\n");
             print("c: iwrap_call. CALL for BT connection.\n");
-#ifdef HOST_VUSB
+#ifdef PROTOCOL_VUSB
             print("u: USB mode. switch to USB.\n");
             print("w: BT mode. switch to Bluetooth.\n");
 #endif
@@ -281,7 +281,7 @@ static uint8_t console_command(uint8_t c)
             print("iwrap_call()\n");
             iwrap_call();
             return 1;
-#ifdef HOST_VUSB
+#ifdef PROTOCOL_VUSB
         case 'u':
             print("USB mode\n");
             init_vusb();
diff --git a/protocol/pjrc.mk b/protocol/pjrc.mk
index f5693ba9..27f908b1 100644
--- a/protocol/pjrc.mk
+++ b/protocol/pjrc.mk
@@ -19,7 +19,4 @@ endif
 VPATH += $(TOP_DIR)/$(PJRC_DIR)
 
 # This indicates using LUFA stack
-# TODO: remove HOST_PJRC
-OPT_DEFS += -DHOST_PJRC
 OPT_DEFS += -DPROTOCOL_PJRC
-
diff --git a/protocol/vusb.mk b/protocol/vusb.mk
index 4c505811..77b1c633 100644
--- a/protocol/vusb.mk
+++ b/protocol/vusb.mk
@@ -1,6 +1,6 @@
 VUSB_DIR = protocol/vusb
 
-OPT_DEFS += -DHOST_VUSB
+OPT_DEFS += -DPROTOCOL_VUSB
 
 SRC +=	$(VUSB_DIR)/main.c \
 	$(VUSB_DIR)/vusb.c \