diff --git a/config.mma.def.h b/config.mma.def.h
index dfd52f7..0b723eb 100644
--- a/config.mma.def.h
+++ b/config.mma.def.h
@@ -95,9 +95,13 @@ LIBINPUT_CONFIG_SEND_EVENTS_DISABLED_ON_EXTERNAL_MOUSE
 static const uint32_t send_events_mode = LIBINPUT_CONFIG_SEND_EVENTS_ENABLED;
 
 /* Touch device information to filter touch events
- * Use udevadm info --tree to obtain info */
-static const uint32_t touch_device_vendor_id = 0x6cb;
-static const uint32_t touch_device_product_id = 0x0;
+ * Use something like this to obtain info:
+ *
+ *     root@host $ udevadm info --tree | grep -a5 Synaptic | grep -E "PRODUCT|NAME"
+ *     │   │ ┆ E: PRODUCT=11/2(vendor)/7(product)/1b1
+ *     │   │ ┆ E: NAME="SynPS/2 Synaptics TouchPad" */
+static const uint32_t touch_device_vendor_id = 0x2;
+static const uint32_t touch_device_product_id = 0x7;
 
 /* You can choose between:
 LIBINPUT_CONFIG_ACCEL_PROFILE_FLAT