diff --git a/crates/compiler/builtins/roc/List.roc b/crates/compiler/builtins/roc/List.roc
index 168de8181a..a729c2febb 100644
--- a/crates/compiler/builtins/roc/List.roc
+++ b/crates/compiler/builtins/roc/List.roc
@@ -39,6 +39,7 @@ interface List
         max,
         map4,
         mapTry,
+        walkTry,
         dropFirst,
         joinMap,
         any,
@@ -959,9 +960,8 @@ mapTry = \list, toResult ->
         Result.map (toResult elem) \ok ->
             List.append state ok
 
-## This is the same as `iterate` but with Result instead of [Continue, Break].
+## This is the same as `iterate` but with [Result] instead of `[Continue, Break]`.
 ## Using `Result` saves a conditional in `mapTry`.
-## It might be useful to expose this in userspace?
 walkTry : List elem, state, (state, elem -> Result state err) -> Result state err
 walkTry = \list, init, func ->
     walkTryHelp list init func 0 (List.len list)
diff --git a/crates/compiler/module/src/symbol.rs b/crates/compiler/module/src/symbol.rs
index df6acd2b7f..3e4a130445 100644
--- a/crates/compiler/module/src/symbol.rs
+++ b/crates/compiler/module/src/symbol.rs
@@ -1373,6 +1373,7 @@ define_builtins! {
         72 LIST_SUBLIST_LOWLEVEL: "sublistLowlevel"
         73 LIST_CAPACITY: "capacity"
         74 LIST_MAP_TRY: "mapTry"
+        75 LIST_WALK_TRY: "walkTry"
     }
     7 RESULT: "Result" => {
         0 RESULT_RESULT: "Result" exposed_type=true // the Result.Result type alias