diff --git a/src/common/reedsolomon/mod.rs b/src/common/reedsolomon/mod.rs
index 0ae414d..ff73bb9 100644
--- a/src/common/reedsolomon/mod.rs
+++ b/src/common/reedsolomon/mod.rs
@@ -498,6 +498,7 @@ impl fmt::Display for GenericGFPoly {
               result.push_str(" - ");
             }
             //coefficient = -coefficient;
+            todo!("probably coefficient should be unsigned but what a mess");
           } else {
             if (result.len() > 0) {
               result.push_str(" + ");