diff --git a/config.h.dist b/config.h.dist
index 4eb00d2..0c5e758 100644
--- a/config.h.dist
+++ b/config.h.dist
@@ -180,12 +180,6 @@
 // --------------------------------------------------------------------------
 // you shouldn't need to edit anything below this line
 
-// inverse, used in distance calculation during DDA setup
-#define	UM_PER_STEP_X		((uint32_t) ((1000.0 / STEPS_PER_MM_X) + 0.5))
-#define	UM_PER_STEP_Y		((uint32_t) ((1000.0 / STEPS_PER_MM_Y) + 0.5))
-#define	UM_PER_STEP_Z		((uint32_t) ((1000.0 / STEPS_PER_MM_Z) + 0.5))
-#define	UM_PER_STEP_E		((uint32_t) ((1000.0 / STEPS_PER_MM_E) + 0.5))
-
 /*
 	Heater
 */
diff --git a/dda.c b/dda.c
index 5cf6f5a..762fc46 100644
--- a/dda.c
+++ b/dda.c
@@ -67,6 +67,14 @@
 
 #define unstep() 							do { _x_step(0); _y_step(0); _z_step(0); _e_step(0); } while (0)
 
+/*
+	Used in distance calculation during DDA setup
+*/
+#define	UM_PER_STEP_X		((uint32_t) ((1000.0 / STEPS_PER_MM_X) + 0.5))
+#define	UM_PER_STEP_Y		((uint32_t) ((1000.0 / STEPS_PER_MM_Y) + 0.5))
+#define	UM_PER_STEP_Z		((uint32_t) ((1000.0 / STEPS_PER_MM_Z) + 0.5))
+#define	UM_PER_STEP_E		((uint32_t) ((1000.0 / STEPS_PER_MM_E) + 0.5))
+
 /*
 	Maths
 */