diff --git a/gc-notes.txt b/gc-notes.txt
index c704c36b..b2a36193 100644
--- a/gc-notes.txt
+++ b/gc-notes.txt
@@ -1,2 +1,3 @@
 Phase 1 (gc-dev) - Add gc.h, make sure it compiles.
 Phase 2 (gc-dev2) - Change how strings are allocated, to clean up the code and be compatible with a new GC algorithm.
+Phase 3 (gc-dev3) - Change from using a Cheney-style copying collector to a naive mark&sweep algorithm.