diff --git a/site/docs/install/t480.md b/site/docs/install/t480.md
index a9d6131..c442125 100644
--- a/site/docs/install/t480.md
+++ b/site/docs/install/t480.md
@@ -376,6 +376,10 @@ You will solder zero-ohm jumpers on the indicated footprints. These correspond
 to TX and RX, which are connected to the R and L lines on the headphone jack,
 respectively; a ground will also be available.
 
+You must solder the zero-ohm jumpers, for UART to work. They are *0201* type
+jumpers, which are extremely small. Please only do this if you have *excellent*
+soldering skills because it's easy to goof this up if you're not careful.
+
 You can hook this up to any 3.3v TTL UART dongle, to get a serial console.
 
 Idea for 2nd NVMe mod