diff --git a/include/jsx_common.hrl b/include/jsx_common.hrl
index 793ff23..57e79a7 100644
--- a/include/jsx_common.hrl
+++ b/include/jsx_common.hrl
@@ -78,12 +78,11 @@
 %% this probably doesn't work properly
 -type jsx_decoder() :: fun((binary()) -> jsx_iterator_result()).
 
-
-
 -type jsx_encoder() :: fun((jsx_encodeable()) -> jsx_iterator_result()).
 
 -type jsx_iterator_result() :: 
     {jsx, jsx_event(), fun(() -> jsx_iterator_result())}
+    | {jsx, [jsx_event()], fun(() -> jsx_iterator_result())}
     | {jsx, incomplete, jsx_iterator()}
     | {error, {badjson, any()}}.
 
diff --git a/src/jsx_verify.erl b/src/jsx_verify.erl
index bcee490..1e9a3c5 100644
--- a/src/jsx_verify.erl
+++ b/src/jsx_verify.erl
@@ -35,17 +35,14 @@
 
     
 -spec is_json(JSON::binary(), Opts::verify_opts()) -> true | false
-        ; (Terms::list(jsx_encodeable()), Opts::verify_opts()) -> true | false
-        ; (F::jsx_iterator(), Opts::verify_opts()) -> true | false.
+        ; (Terms::list(jsx_encodeable()), Opts::verify_opts()) -> true | false.
     
 is_json(JSON, OptsList) when is_binary(JSON) ->
     F = jsx:decoder(extract_parser_opts(OptsList)),
     verify(F(JSON), parse_opts(OptsList));
 is_json(JSON, OptsList) when is_list(JSON) ->
     F = jsx:encoder(extract_parser_opts(OptsList)),
-    verify(F(JSON), parse_opts(OptsList));
-is_json(F, OptsList) when is_function(F) ->
-    verify(jsx_utils:collect(F), parse_opts(OptsList)).
+    verify(F(JSON), parse_opts(OptsList)).
 
 
 extract_parser_opts(Opts) ->