diff --git a/src/kaleidoscope/Hardware.h b/src/kaleidoscope/Hardware.h
index 7d846954..8f231c47 100644
--- a/src/kaleidoscope/Hardware.h
+++ b/src/kaleidoscope/Hardware.h
@@ -21,6 +21,8 @@
 
 #pragma once
 
+#ifdef __AVR__
+
 #include "kaleidoscope/MatrixAddr.h"
 #include "kaleidoscope_internal/deprecations.h"
 
@@ -402,3 +404,5 @@ class Hardware {
   /** @} */
 };
 }
+
+#endif
diff --git a/src/kaleidoscope/device/keyboardio/twi.c b/src/kaleidoscope/device/keyboardio/twi.c
index f1c8eb65..38fe7e59 100644
--- a/src/kaleidoscope/device/keyboardio/twi.c
+++ b/src/kaleidoscope/device/keyboardio/twi.c
@@ -18,6 +18,8 @@
   Modified 2012 by Todd Krein (todd@krein.org) to implement repeated starts
 */
 
+#ifdef __AVR__
+
 #define ENABLE_TWI_SLAVE_MODE 0
 
 #include <math.h>
@@ -559,3 +561,5 @@ ISR(TWI_vect) {
     break;
   }
 }
+
+#endif
diff --git a/src/kaleidoscope/device/keyboardio/twi.h b/src/kaleidoscope/device/keyboardio/twi.h
index 29cdf16b..e3753519 100644
--- a/src/kaleidoscope/device/keyboardio/twi.h
+++ b/src/kaleidoscope/device/keyboardio/twi.h
@@ -16,6 +16,8 @@
   with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
+#ifdef __AVR__
+
 #ifndef twi_h
 #define twi_h
 
@@ -51,3 +53,4 @@ void twi_stop(void);
 void twi_releaseBus(void);
 
 #endif
+#endif
diff --git a/src/kaleidoscope/driver/bootloader/None.h b/src/kaleidoscope/driver/bootloader/None.h
index d91fe105..a240ae0a 100644
--- a/src/kaleidoscope/driver/bootloader/None.h
+++ b/src/kaleidoscope/driver/bootloader/None.h
@@ -17,7 +17,6 @@
 
 #pragma once
 
-#include <avr/wdt.h>
 #include "kaleidoscope/driver/bootloader/Base.h"
 
 namespace kaleidoscope {
diff --git a/src/kaleidoscope/driver/storage/AVREEPROM.h b/src/kaleidoscope/driver/storage/AVREEPROM.h
index 6a39f2b3..9871a084 100644
--- a/src/kaleidoscope/driver/storage/AVREEPROM.h
+++ b/src/kaleidoscope/driver/storage/AVREEPROM.h
@@ -17,6 +17,8 @@
 
 #pragma once
 
+#ifdef __AVR__
+
 #include "kaleidoscope/driver/storage/Base.h"
 #include <EEPROM.h>
 
@@ -57,3 +59,5 @@ class AVREEPROM : public kaleidoscope::driver::storage::Base<_StorageProps> {
 }
 }
 }
+
+#endif
diff --git a/src/kaleidoscope/plugin/FirmwareDump.cpp b/src/kaleidoscope/plugin/FirmwareDump.cpp
index fc2450a0..04a40f7f 100644
--- a/src/kaleidoscope/plugin/FirmwareDump.cpp
+++ b/src/kaleidoscope/plugin/FirmwareDump.cpp
@@ -15,6 +15,7 @@
  * this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#ifdef __AVR__
 #ifndef KALEIDOSCOPE_VIRTUAL_BUILD
 
 #include <Kaleidoscope-FirmwareDump.h>
@@ -72,3 +73,4 @@ EventHandlerResult FirmwareDump::onFocusEvent(const char *command) {
 kaleidoscope::plugin::FirmwareDump FirmwareDump;
 
 #endif
+#endif
diff --git a/src/kaleidoscope/plugin/FirmwareDump.h b/src/kaleidoscope/plugin/FirmwareDump.h
index 2f841174..aa3a41a4 100644
--- a/src/kaleidoscope/plugin/FirmwareDump.h
+++ b/src/kaleidoscope/plugin/FirmwareDump.h
@@ -21,6 +21,8 @@
 #error "Firmware Dump is not available for virtual builds"
 #else
 
+#ifdef __AVR__
+
 #include <Kaleidoscope.h>
 
 namespace kaleidoscope {
@@ -42,3 +44,4 @@ class FirmwareDump : public kaleidoscope::Plugin {
 extern kaleidoscope::plugin::FirmwareDump FirmwareDump;
 
 #endif
+#endif