diff --git a/modules/pdp11/README.md b/modules/pdp11/README.md
index 487326fca..008d511f0 100644
--- a/modules/pdp11/README.md
+++ b/modules/pdp11/README.md
@@ -20,6 +20,7 @@ PDPjs is currently comprised of the following non-shared components, as listed i
 * [messages.js](/modules/pdp11/lib/messages.js)
 * [panel.js](/modules/pdp11/lib/panel.js)
 * [bus.js](/modules/pdp11/lib/bus.js)
+* [device.js](/modules/pdp11/lib/device.js)
 * [memory.js](/modules/pdp11/lib/memory.js)
 * [cpu.js](/modules/pdp11/lib/cpu.js)
 * [cpustate.js](/modules/pdp11/lib/cpustate.js)
@@ -27,5 +28,6 @@ PDPjs is currently comprised of the following non-shared components, as listed i
 * [rom.js](/modules/pdp11/lib/rom.js)
 * [ram.js](/modules/pdp11/lib/ram.js)
 * [keyboard.js](/modules/pdp11/lib/keyboard.js)
+* [serialport.js](/modules/pdp11/lib/serialport.js)
 * [debugger.js](/modules/pdp11/lib/debugger.js)
 * [computer.js](/modules/pdp11/lib/computer.js)