diff --git a/src/add-ons/kernel/bus_managers/ps2/ps2_dev.c b/src/add-ons/kernel/bus_managers/ps2/ps2_dev.c
index c2afd6871c..85d137dd8b 100644
--- a/src/add-ons/kernel/bus_managers/ps2/ps2_dev.c
+++ b/src/add-ons/kernel/bus_managers/ps2/ps2_dev.c
@@ -102,7 +102,7 @@ ps2_dev_detect_pointing(ps2_dev *dev, device_hooks **hooks)
 	// probe devices
 	// the probe function has to set the dev name and the dev packet size
 
-#if 1
+#if 0
 	status = probe_trackpoint(dev);
 	if (status == B_OK) {
 		*hooks = &gStandardMouseDeviceHooks;
diff --git a/src/add-ons/kernel/bus_managers/ps2/ps2_synaptics.c b/src/add-ons/kernel/bus_managers/ps2/ps2_synaptics.c
index 7fed15e50c..e273496dee 100644
--- a/src/add-ons/kernel/bus_managers/ps2/ps2_synaptics.c
+++ b/src/add-ons/kernel/bus_managers/ps2/ps2_synaptics.c
@@ -421,14 +421,14 @@ get_synaptics_movment(synaptics_cookie* cookie, mouse_movement *movement)
  	event.yPosition = event_buffer[5];
 
  	val32 = event_buffer[1] & 0x0F;
- 	event.xPosition+= val32 << 8;
+ 	event.xPosition += val32 << 8;
  	val32 = event_buffer[1] >> 4 & 0x0F;
- 	event.yPosition+= val32 << 8;
+ 	event.yPosition += val32 << 8;
 
  	xTwelfBit = event_buffer[3] >> 4 & 1;
- 	event.xPosition+= xTwelfBit << 12;
+ 	event.xPosition += xTwelfBit << 12;
  	yTwelfBit = event_buffer[3] >> 5 & 1;
- 	event.yPosition+= yTwelfBit << 12;
+ 	event.yPosition += yTwelfBit << 12;
 
  	status = touchevent_to_movement(cookie, &event, movement);