diff --git a/atom/browser/mac/dict_util.h b/atom/browser/mac/dict_util.h
index 404636d1901a..3ffd8ba51006 100644
--- a/atom/browser/mac/dict_util.h
+++ b/atom/browser/mac/dict_util.h
@@ -10,7 +10,7 @@
 #include "base/memory/scoped_ptr.h"
 
 namespace base {
-class Value;
+class ListValue;
 class DictionaryValue;
 }
 
@@ -21,6 +21,8 @@ NSDictionary* DictionaryValueToNSDictionary(const base::DictionaryValue& value);
 std::unique_ptr<base::DictionaryValue> NSDictionaryToDictionaryValue(
     NSDictionary* dict);
 
+std::unique_ptr<base::ListValue> NSArrayToListValue(NSArray* arr);
+
 }  // namespace atom
 
 #endif  // ATOM_BROWSER_MAC_DICT_UTIL_H_
diff --git a/atom/browser/mac/dict_util.mm b/atom/browser/mac/dict_util.mm
index 43b629cc32be..8692f001f6a8 100644
--- a/atom/browser/mac/dict_util.mm
+++ b/atom/browser/mac/dict_util.mm
@@ -10,8 +10,6 @@
 
 namespace atom {
 
-namespace {
-
 std::unique_ptr<base::ListValue> NSArrayToListValue(NSArray* arr) {
   if (!arr)
     return nullptr;
@@ -51,8 +49,6 @@ std::unique_ptr<base::ListValue> NSArrayToListValue(NSArray* arr) {
   return result;
 }
 
-}  // namespace
-
 NSDictionary* DictionaryValueToNSDictionary(const base::DictionaryValue& value) {
   std::string json;
   if (!base::JSONWriter::Write(value, &json))