diff --git a/docs/HistoricalNotes/2003-01-23-CygwinNotes.txt b/docs/HistoricalNotes/2003-01-23-CygwinNotes.txt
index 0bce17f7318..fbe811d627f 100644
--- a/docs/HistoricalNotes/2003-01-23-CygwinNotes.txt
+++ b/docs/HistoricalNotes/2003-01-23-CygwinNotes.txt
@@ -17,15 +17,12 @@ under Cygwin and/or Mingw.
    DONT_BUILD_RELINKED. This breaks all the tools makefiles; you just need to
    change them to have .a's.
 
-5. Cygwin's math.h defines log2(); it needs to be #undefed if already defined
-   in MathExtras.h.
+5. There isn't a <values.h>.
 
-6. There isn't a <values.h>.
-
-7. There isn't a mallinfo() (or, at least, it's documented, but it doesn't seem
+6. There isn't a mallinfo() (or, at least, it's documented, but it doesn't seem
    to link).
 
-8. The version of Bison that cygwin (and newer Linux versions) comes with
+7. The version of Bison that cygwin (and newer Linux versions) comes with
    does not like = signs in rules. Burg's gram.yc source file uses them. I think
    you can just take them out.