diff --git a/src/avr/timer.c b/src/avr/timer.c
index 31f94caf..442bff32 100644
--- a/src/avr/timer.c
+++ b/src/avr/timer.c
@@ -6,10 +6,10 @@
 
 #include <avr/interrupt.h> // TCNT1
 #include "autoconf.h" // CONFIG_AVR_CLKPR
+#include "board/misc.h" // timer_from_us
 #include "command.h" // shutdown
 #include "irq.h" // irq_save
 #include "sched.h" // sched_timer_kick
-#include "timer.h" // timer_from_us
 
 
 /****************************************************************
diff --git a/src/avr/timer.h b/src/avr/timer.h
deleted file mode 100644
index 188d8a98..00000000
--- a/src/avr/timer.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef __AVR_TIMER_H
-#define __AVR_TIMER_H
-
-#include <stdint.h>
-
-uint32_t timer_from_us(uint32_t us);
-void timer_periodic(void);
-uint32_t timer_read_time(void);
-uint8_t timer_set_next(uint32_t next);
-uint8_t timer_try_set_next(uint32_t next);
-
-#endif // timer.h
diff --git a/src/generic/misc.h b/src/generic/misc.h
index 9b2986be..ce1c8f02 100644
--- a/src/generic/misc.h
+++ b/src/generic/misc.h
@@ -9,6 +9,12 @@ void console_pop_input(uint8_t len);
 char *console_get_output(uint8_t len);
 void console_push_output(uint8_t len);
 
+uint32_t timer_from_us(uint32_t us);
+void timer_periodic(void);
+uint32_t timer_read_time(void);
+uint8_t timer_set_next(uint32_t next);
+uint8_t timer_try_set_next(uint32_t next);
+
 size_t alloc_maxsize(size_t reqsize);
 
 uint16_t crc16_ccitt(char *buf, uint8_t len);
diff --git a/src/sched.c b/src/sched.c
index 2ac1a929..539cb57b 100644
--- a/src/sched.c
+++ b/src/sched.c
@@ -9,7 +9,7 @@
 #include <stddef.h> // NULL
 #include "autoconf.h" // CONFIG_*
 #include "board/irq.h" // irq_save
-#include "board/timer.h" // timer_from_us
+#include "board/misc.h" // timer_from_us
 #include "command.h" // shutdown
 #include "sched.h" // sched_from_us
 #include "stepper.h" // stepper_event
diff --git a/src/simulator/timer.h b/src/simulator/timer.h
deleted file mode 100644
index 71b64502..00000000
--- a/src/simulator/timer.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef __SIMU_TIMER_H
-#define __SIMU_TIMER_H
-
-#include <stdint.h>
-
-uint32_t timer_from_us(uint32_t us);
-void timer_periodic(void);
-uint32_t timer_read_time(void);
-uint8_t timer_set_next(uint32_t next);
-uint8_t timer_try_set_next(uint32_t next);
-
-#endif // timer.h