diff --git a/src/kaleidoscope/hardware/olkb/Planck.cpp b/src/kaleidoscope/hardware/olkb/Planck.cpp
index 2a70ba99..5597171f 100644
--- a/src/kaleidoscope/hardware/olkb/Planck.cpp
+++ b/src/kaleidoscope/hardware/olkb/Planck.cpp
@@ -18,6 +18,7 @@
 #ifdef ARDUINO_AVR_PLANCK
 
 #include <Kaleidoscope.h>
+#include <avr/wdt.h>
 
 namespace kaleidoscope {
 namespace hardware {
diff --git a/src/kaleidoscope/hardware/technomancy/Atreus.cpp b/src/kaleidoscope/hardware/technomancy/Atreus.cpp
index e41e3677..61a7c375 100644
--- a/src/kaleidoscope/hardware/technomancy/Atreus.cpp
+++ b/src/kaleidoscope/hardware/technomancy/Atreus.cpp
@@ -27,6 +27,7 @@
 #ifdef ARDUINO_AVR_ATREUS
 
 #include <Kaleidoscope.h>
+#include <avr/wdt.h>
 
 namespace kaleidoscope {
 namespace hardware {