diff --git a/libs/surfaces/osc/osc.cc b/libs/surfaces/osc/osc.cc
index c2956fa551..e12738d726 100644
--- a/libs/surfaces/osc/osc.cc
+++ b/libs/surfaces/osc/osc.cc
@@ -1762,10 +1762,10 @@ OSC::scrub (float delta, lo_message msg)
 
 	int64_t now = ARDOUR::get_microseconds ();
 	int64_t diff = now - scrub_time;
-	if (diff > 35) {
+	if (diff > 35000) {
 		// speed 1 (or 0 if jog wheel supports touch)
 		speed = delta;
-	} else if ((diff > 20) && (fabs(scrub_speed) == 1)) {
+	} else if ((diff > 20000) && (fabs(scrub_speed) == 1)) {
 		// add some hysteresis to stop excess speed jumps
 		speed = delta;
 	} else {
@@ -3616,7 +3616,7 @@ OSC::periodic (void)
 		// for those jog wheels that don't have 0 on release (touch), time out.
 		int64_t now = ARDOUR::get_microseconds ();
 		int64_t diff = now - scrub_time;
-		if (diff > 100) {
+		if (diff > 120000) {
 			scrub_speed = 0;
 			session->request_transport_speed (0);
 			// locate to the place PH was at last tick