diff --git a/src/filter-mouse.c b/src/filter-mouse.c
index 8f572752..a2284c00 100644
--- a/src/filter-mouse.c
+++ b/src/filter-mouse.c
@@ -196,7 +196,7 @@ accelerator_set_speed(struct motion_filter *filter,
 double
 pointer_accel_profile_linear(struct motion_filter *filter,
 			     void *data,
-			     double speed_in, /* in device units (units/µs) */
+			     double speed_in, /* in normalized units */
 			     uint64_t time)
 {
 	struct pointer_accelerator *accel_filter =
@@ -206,9 +206,6 @@ pointer_accel_profile_linear(struct motion_filter *filter,
 	const double incline = accel_filter->incline;
 	double factor; /* unitless */
 
-	/* Normalize to 1000dpi, because the rest below relies on that */
-	speed_in = speed_in * DEFAULT_MOUSE_DPI/accel_filter->dpi;
-
 	/*
 	   Our acceleration function calculates a factor to accelerate input
 	   deltas with. The function is a double incline with a plateau,