diff --git a/TODO b/TODO
index 3830622e..781a00e1 100644
--- a/TODO
+++ b/TODO
@@ -1,4 +1,9 @@
 
+- add support for PFM files, portable float maps
+
+  used in HDR imaging, apparently
+
+
 
 - expose more of the tone funcs in nip2