diff --git a/src/add-ons/kernel/bus_managers/ps2/ps2_standard_mouse.cpp b/src/add-ons/kernel/bus_managers/ps2/ps2_standard_mouse.cpp
index 65c1c78a50..5dbe34562f 100644
--- a/src/add-ons/kernel/bus_managers/ps2/ps2_standard_mouse.cpp
+++ b/src/add-ons/kernel/bus_managers/ps2/ps2_standard_mouse.cpp
@@ -230,7 +230,7 @@ standard_mouse_handle_int(ps2_dev* dev)
 	if (cookie->packet_index == 1) {
 		int xDelta
 			= ((cookie->buffer[0] & 0x10) ? 0xFFFFFF00 : 0) | data;
-		if (xDelta < -100 || xDelta > 100) {
+		if (xDelta < -256 || xDelta > 255) {
 			INFO("ps2: strange mouse data, x-delta %d, trying resync\n",
 				xDelta);
 			cookie->packet_index = 0;
@@ -240,7 +240,7 @@ standard_mouse_handle_int(ps2_dev* dev)
 	if (cookie->packet_index == 2) {
 		int yDelta
 			= ((cookie->buffer[0] & 0x20) ? 0xFFFFFF00 : 0) | data;
-		if (yDelta < -100 || yDelta > 100) {
+		if (yDelta < -256 || yDelta > 255) {
 			INFO("ps2: strange mouse data, y-delta %d, trying resync\n",
 				yDelta);
 			cookie->packet_index = 0;