diff --git a/keyboards/fc660c/matrix.c b/keyboards/fc660c/matrix.c
index e6e494810..40d606f57 100644
--- a/keyboards/fc660c/matrix.c
+++ b/keyboards/fc660c/matrix.c
@@ -28,6 +28,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "timer.h"
 #include "matrix.h"
 #include "led.h"
+#include "avr/timer_avr.h"
 
 // Timer resolution check
 #if (1000000/TIMER_RAW_FREQ > 20)
diff --git a/keyboards/fc980c/matrix.c b/keyboards/fc980c/matrix.c
index 1126f3047..6cdd9cf42 100644
--- a/keyboards/fc980c/matrix.c
+++ b/keyboards/fc980c/matrix.c
@@ -28,6 +28,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "timer.h"
 #include "matrix.h"
 #include "led.h"
+#include "avr/timer_avr.h"
 // #include QMK_KEYBOARD_H
 
 
diff --git a/keyboards/hhkb/ansi/matrix.c b/keyboards/hhkb/ansi/matrix.c
index 879eb337c..529ba8b8f 100644
--- a/keyboards/hhkb/ansi/matrix.c
+++ b/keyboards/hhkb/ansi/matrix.c
@@ -26,6 +26,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "util.h"
 #include "timer.h"
 #include "matrix.h"
+#include "avr/timer_avr.h"
 #include "hhkb_avr.h"
 #include <avr/wdt.h>
 #include "suspend.h"
diff --git a/keyboards/hhkb/jp/matrix.c b/keyboards/hhkb/jp/matrix.c
index fed2b3c3a..c0dca6a99 100644
--- a/keyboards/hhkb/jp/matrix.c
+++ b/keyboards/hhkb/jp/matrix.c
@@ -26,6 +26,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "util.h"
 #include "timer.h"
 #include "matrix.h"
+#include "avr/timer_avr.h"
 #include "hhkb_avr.h"
 #include <avr/wdt.h>
 #include "suspend.h"