diff --git a/src/server/json_family.cc b/src/server/json_family.cc
index 39164ef1a38d..94371d24f4fd 100644
--- a/src/server/json_family.cc
+++ b/src/server/json_family.cc
@@ -319,9 +319,9 @@ bool JsonAreEquals(const JsonType& lhs, const JsonType& rhs) {
   }
 }
 
-template <typename Callback>
-OpResult<DbSlice::AddOrFindResult> SetJson(const OpArgs& op_args, string_view key,
-                                           Callback parse_json_value) {
+OpResult<DbSlice::AddOrFindResult> SetJson(
+    const OpArgs& op_args, string_view key,
+    absl::FunctionRef<OpResult<JsonType>()> parse_json_value) {
   auto& db_slice = op_args.GetDbSlice();
 
   auto op_res = db_slice.AddOrFind(op_args.db_cntx, key);
diff --git a/src/server/search/doc_accessors.cc b/src/server/search/doc_accessors.cc
index d82f7b8bfa16..009c4ec39510 100644
--- a/src/server/search/doc_accessors.cc
+++ b/src/server/search/doc_accessors.cc
@@ -81,8 +81,8 @@ FieldValue ExtractSortableValueFromJson(const search::Schema& schema, string_vie
 }
 
 /* Returns true if json elements were successfully processed. */
-template <typename Callback>
-bool ProcessJsonElements(const std::vector<JsonType>& json_elements, Callback&& cb) {
+bool ProcessJsonElements(const std::vector<JsonType>& json_elements,
+                         absl::FunctionRef<bool(const JsonType&)> cb) {
   auto process = [&cb](const auto& json_range) -> bool {
     for (const auto& json : json_range) {
       if (!json.is_null() && !cb(json)) {