diff --git a/src/filter-trackpoint.c b/src/filter-trackpoint.c
index 5e07851d..ebc7ee12 100644
--- a/src/filter-trackpoint.c
+++ b/src/filter-trackpoint.c
@@ -46,7 +46,8 @@ struct trackpoint_accelerator {
 double
 trackpoint_accel_profile(struct motion_filter *filter,
 			 void *data,
-			 double velocity)
+			 double velocity,
+			 uint64_t time)
 {
 	struct trackpoint_accelerator *accel_filter =
 		(struct trackpoint_accelerator *)filter;
@@ -82,7 +83,7 @@ trackpoint_accelerator_filter(struct motion_filter *filter,
 	trackers_feed(&accel_filter->trackers, unaccelerated, time);
 	velocity = trackers_velocity(&accel_filter->trackers, time);
 
-	f = trackpoint_accel_profile(filter, data, velocity);
+	f = trackpoint_accel_profile(filter, data, velocity, time);
 	coords.x = unaccelerated->x * f;
 	coords.y = unaccelerated->y * f;
 
diff --git a/src/filter.h b/src/filter.h
index 506ab123..3865b819 100644
--- a/src/filter.h
+++ b/src/filter.h
@@ -154,5 +154,6 @@ touchpad_lenovo_x230_accel_profile(struct motion_filter *filter,
 double
 trackpoint_accel_profile(struct motion_filter *filter,
 			 void *data,
-			 double delta);
+			 double delta,
+			 uint64_t time);
 #endif /* FILTER_H */
diff --git a/tools/ptraccel-debug.c b/tools/ptraccel-debug.c
index 670f0457..fbb06755 100644
--- a/tools/ptraccel-debug.c
+++ b/tools/ptraccel-debug.c
@@ -169,24 +169,6 @@ print_accel_func(struct motion_filter *filter,
 	}
 }
 
-static void
-print_accel_func_trackpoint(struct motion_filter *filter,
-			    int max)
-{
-	printf("# gnuplot:\n");
-	printf("# set xlabel \"deltas (units)\"\n");
-	printf("# set ylabel \"raw accel factor\"\n");
-	printf("# set style data lines\n");
-	printf("# plot \"gnuplot.data\" using 1:2 title 'accel factor'\n");
-	printf("#\n");
-	printf("# data: delta(units) factor\n");
-	for (double delta = 0; delta < max; delta += 0.2) {
-		double factor = trackpoint_accel_profile(filter, NULL, delta);
-
-		printf("%.2f %f\n", delta, factor);
-	}
-}
-
 static void
 usage(void)
 {
@@ -350,7 +332,7 @@ main(int argc, char **argv)
 		profile = touchpad_lenovo_x230_accel_profile;
 	} else if (streq(filter_type, "trackpoint")) {
 		filter = create_pointer_accelerator_filter_trackpoint(tp_range_max);
-		profile = NULL; /* trackpoint is special */
+		profile = trackpoint_accel_profile;
 	} else {
 		fprintf(stderr, "Invalid filter type %s\n", filter_type);
 		return 1;
@@ -381,10 +363,7 @@ main(int argc, char **argv)
 
 	switch (mode) {
 	case ACCEL:
-		if (!profile) /* trackpoint */
-			print_accel_func_trackpoint(filter, tp_range_max);
-		else
-			print_accel_func(filter, profile, dpi);
+		print_accel_func(filter, profile, dpi);
 		break;
 	case DELTA:
 		print_ptraccel_deltas(filter, step);