diff --git a/config.gen3.h b/config.gen3.h
index 2cd846c..ac58e57 100644
--- a/config.gen3.h
+++ b/config.gen3.h
@@ -368,12 +368,6 @@ DEFINE_TEMP_SENSOR(noheater,	TT_INTERCOM,		0)
 */
 #define		STEP_INTERRUPT_INTERRUPTIBLE	1
 
-/*
-	how often we overflow and update our clock; with F_CPU=16MHz, max is < 4.096ms (TICK_TIME = 65535)
-*/
-#define		TICK_TIME			2 MS
-#define		TICK_TIME_MS	(TICK_TIME / (F_CPU / 1000))
-
 /*
 	temperature history count. This is how many temperature readings to keep in order to calculate derivative in PID loop
 	higher values make PID derivative term more stable at the expense of reaction time
diff --git a/config.gen6.h b/config.gen6.h
index e9a5004..29068f3 100644
--- a/config.gen6.h
+++ b/config.gen6.h
@@ -357,12 +357,6 @@ DEFINE_HEATER(extruder,   PORTD, PIND6, OCR2B)
 */
 #define		STEP_INTERRUPT_INTERRUPTIBLE	1
 
-/*
-	how often we overflow and update our clock; with F_CPU=16MHz, max is < 4.096ms (TICK_TIME = 65535)
-*/
-#define		TICK_TIME			2 MS
-#define		TICK_TIME_MS	(TICK_TIME / (F_CPU / 1000))
-
 /*
 	temperature history count. This is how many temperature readings to keep in order to calculate derivative in PID loop
 	higher values make PID derivative term more stable at the expense of reaction time
diff --git a/config.h.dist b/config.h.dist
index 36cc491..999cec9 100644
--- a/config.h.dist
+++ b/config.h.dist
@@ -385,12 +385,6 @@ DEFINE_HEATER(bed,			PORTB, PINB4, OCR0B)
 */
 #define		STEP_INTERRUPT_INTERRUPTIBLE	1
 
-/*
-	how often we overflow and update our clock; with F_CPU=16MHz, max is < 4.096ms (TICK_TIME = 65535)
-*/
-#define		TICK_TIME			2 MS
-#define		TICK_TIME_MS	(TICK_TIME / (F_CPU / 1000))
-
 /*
 	temperature history count. This is how many temperature readings to keep in order to calculate derivative in PID loop
 	higher values make PID derivative term more stable at the expense of reaction time
diff --git a/config.ramps.h b/config.ramps.h
index dcd719e..c159229 100644
--- a/config.ramps.h
+++ b/config.ramps.h
@@ -371,12 +371,6 @@ DEFINE_HEATER(fan,			PORTH, PINH6, OCR2B)
 */
 #define		STEP_INTERRUPT_INTERRUPTIBLE	1
 
-/*
-	how often we overflow and update our clock; with F_CPU=16MHz, max is < 4.096ms (TICK_TIME = 65535)
-*/
-#define		TICK_TIME			2 MS
-#define		TICK_TIME_MS	(TICK_TIME / (F_CPU / 1000))
-
 /*
 	temperature history count. This is how many temperature readings to keep in order to calculate derivative in PID loop
 	higher values make PID derivative term more stable at the expense of reaction time
diff --git a/timer.c b/timer.c
index 9481aed..fe60c65 100644
--- a/timer.c
+++ b/timer.c
@@ -4,6 +4,12 @@
 
 #include	"dda_queue.h"
 
+/*
+	how often we overflow and update our clock; with F_CPU=16MHz, max is < 4.096ms (TICK_TIME = 65535)
+*/
+#define		TICK_TIME			2 MS
+#define		TICK_TIME_MS	(TICK_TIME / (F_CPU / 1000))
+
 volatile uint32_t	next_step_time;
 
 uint8_t						clock_counter_10ms = 0;