diff --git a/docs/chapters/hardware_details.xml b/docs/chapters/hardware_details.xml
index 08f488c..23f7355 100644
--- a/docs/chapters/hardware_details.xml
+++ b/docs/chapters/hardware_details.xml
@@ -66,8 +66,9 @@
                 </callout>
                 <callout arearefs="debug" id="link_debug">
                     <para>debug (P3): same as serial, but using the FTDI
-                    serial cable. Make sure to disconnect the power pin
-                    of the FTDI cable before connecting it to the connector.
+                    serial cable. It is recommended to cut the voltage wire of
+                    the 6pin FTDI connector before plugging the cable into the
+                    simtrace.
                     </para>
                 </callout>
                 <callout arearefs="jtag" id="link_jtag">