diff --git a/TODO b/TODO
index d11c0a2fba1ef0884db9363522223aa32eb2cd66..d064e481ecf77e814f3178bd0087569809a145ba 100644
--- a/TODO
+++ b/TODO
@@ -1,6 +1,8 @@
 General fixes:
 =============
 
+- 'const' for getter APIs? (use mutable internally)
+
 - Fix TT 'kern' on/off and GPOS interaction (move kerning before GPOS)
 
 - Do proper rounding when scaling from font space?