diff --git a/exchange/bitswap/wantlist/wantlist.go b/exchange/bitswap/wantlist/wantlist.go
index 22b2c1c2c..1bf662102 100644
--- a/exchange/bitswap/wantlist/wantlist.go
+++ b/exchange/bitswap/wantlist/wantlist.go
@@ -17,6 +17,8 @@ type Wantlist struct {
 }
 
 type Entry struct {
+	// TODO consider making entries immutable so they can be shared safely and
+	// slices can be copied efficiently.
 	Key      u.Key
 	Priority int
 }