diff --git a/TODO b/TODO
new file mode 100644
index 0000000..fe19de2
--- /dev/null
+++ b/TODO
@@ -0,0 +1,6 @@
+- Make win32.c compile under Cygwin. It's just one function (fullpath()) that
+  needs to be replaced.
+
+// end of TODO ...
+
+