diff --git a/src/kaleidoscope/device/dygma/raise/TWI.h b/src/kaleidoscope/device/dygma/raise/TWI.h
index ba191b09..3e365f7a 100644
--- a/src/kaleidoscope/device/dygma/raise/TWI.h
+++ b/src/kaleidoscope/device/dygma/raise/TWI.h
@@ -16,6 +16,8 @@
  * this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#pragma once
+
 #ifdef ARDUINO_SAMD_RAISE
 
 #include <Arduino.h>
diff --git a/src/kaleidoscope/device/keyboardio/twi.h b/src/kaleidoscope/device/keyboardio/twi.h
index 5b22cc40..773ce9cb 100644
--- a/src/kaleidoscope/device/keyboardio/twi.h
+++ b/src/kaleidoscope/device/keyboardio/twi.h
@@ -16,10 +16,9 @@
   with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifdef __AVR__
+#pragma once
 
-#ifndef twi_h
-#define twi_h
+#ifdef __AVR__
 
 #ifndef KALEIDOSCOPE_VIRTUAL_BUILD
 
@@ -56,4 +55,3 @@ void twi_releaseBus(void);
 
 #endif // ifndef KALEIDOSCOPE_VIRTUAL_BUILD
 #endif
-#endif
diff --git a/src/kaleidoscope/plugin/Turbo.h b/src/kaleidoscope/plugin/Turbo.h
index f5d67e4f..3a2a74d4 100644
--- a/src/kaleidoscope/plugin/Turbo.h
+++ b/src/kaleidoscope/plugin/Turbo.h
@@ -19,6 +19,8 @@
 #include "kaleidoscope/Runtime.h"
 #include <Kaleidoscope-Ranges.h>
 
+#pragma once
+
 #define Key_Turbo Key{kaleidoscope::ranges::TURBO }
 
 namespace kaleidoscope {