diff --git a/fixed_wide/src/fixed_wide_traits.rs b/fixed_wide/src/fixed_wide_traits.rs
index 566d396..24459f5 100644
--- a/fixed_wide/src/fixed_wide_traits.rs
+++ b/fixed_wide/src/fixed_wide_traits.rs
@@ -78,6 +78,7 @@ impl<const CHUNKS:usize,Frac:Unsigned> Fixed<CHUNKS,Frac>
 		//cheat to make the types match
 		let wide_self=self.wide_mul(Fixed::<CHUNKS,Frac>::ONE);
 		loop{
+			//TODO: closed loop over bit shift exponent rather than pow2
 			if pow2==Self::ZERO{
 				break result;
 			}