diff --git a/CHANGES.txt b/CHANGES.txt
index 7374dc4add..7ae97b0ba8 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -6,6 +6,10 @@ data could fill up the buffer and cause a denial-of-service attack.
 
 The alien interface now supports "float" and "double" types.
 
+Defining a predicate subclass of tuple is supported now. Note that
+unions and complements over tuples are still not supported. Also,
+predicate subclasses of concrete tuple classes are not supported either.
+
 Factor 0.74:
 ------------
 
diff --git a/TODO.FACTOR.txt b/TODO.FACTOR.txt
index 6e3e02facc..e1c03c1385 100644
--- a/TODO.FACTOR.txt
+++ b/TODO.FACTOR.txt
@@ -61,6 +61,7 @@
 
 + compiler:
 
+- optimize the generic word prologue
 - [ [ dup call ] dup call ] infer hangs
 - more accurate types for various words
 - declarations