diff --git a/src/jsx_to_json.erl b/src/jsx_to_json.erl
index 3924bb6..30c6ffd 100644
--- a/src/jsx_to_json.erl
+++ b/src/jsx_to_json.erl
@@ -38,8 +38,7 @@
 
 -spec to_json(Source::(binary() | list()), Opts::opts()) -> binary().
     
-to_json(Source, Opts) when (is_binary(Source) andalso is_list(Opts))
-        orelse (is_list(Source) andalso is_list(Opts)) ->
+to_json(Source, Opts) when is_list(Opts) ->
     (gen_json:parser(?MODULE, Opts, jsx_utils:extract_opts(Opts)))(Source).
 
 
diff --git a/src/jsx_to_term.erl b/src/jsx_to_term.erl
index c43df50..35b93ad 100644
--- a/src/jsx_to_term.erl
+++ b/src/jsx_to_term.erl
@@ -36,8 +36,7 @@
 
 -spec to_term(Source::(binary() | list()), Opts::opts()) -> binary().
     
-to_term(Source, Opts) when (is_binary(Source) andalso is_list(Opts))
-        orelse (is_list(Source) andalso is_list(Opts)) ->
+to_term(Source, Opts) when is_list(Opts) ->
     (gen_json:parser(?MODULE, Opts, jsx_utils:extract_opts(Opts)))(Source).