diff --git a/yarn-project/circuits.js/src/abis/abis.ts b/yarn-project/circuits.js/src/abis/abis.ts
index bcf7d01e3db..468deee240e 100644
--- a/yarn-project/circuits.js/src/abis/abis.ts
+++ b/yarn-project/circuits.js/src/abis/abis.ts
@@ -334,6 +334,7 @@ export function computeBlockHash(
  * @param globals - The global variables to put into the block hash.
  * @returns The globals hash.
  * TODO: move this to GlobalVariables?
+ * TODO(#3941) Investigate whether to nuke this once #3941 is done.
  */
 export function computeGlobalsHash(globals: GlobalVariables): Fr {
   return Fr.fromBuffer(
diff --git a/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/global_variables.nr b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/global_variables.nr
index c8b5ba74d0b..23a43a02703 100644
--- a/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/global_variables.nr
+++ b/yarn-project/noir-protocol-circuits/src/crates/types/src/abis/global_variables.nr
@@ -45,6 +45,7 @@ impl Eq for GlobalVariables {
     }
 }
 
+// TODO(#3941) This is only used in Header.block_hash() --> Nuke it once that func is updated
 impl Hash for GlobalVariables {
     fn hash(self) -> Field {
         dep::std::hash::pedersen_hash_with_separator([