diff --git a/coding/file_container.cpp b/coding/file_container.cpp
index d66d63bdba..cfe3d957fb 100644
--- a/coding/file_container.cpp
+++ b/coding/file_container.cpp
@@ -60,6 +60,14 @@ FilesContainerR::ReaderT FilesContainerR::GetReader(Tag const & tag) const
     MYTHROW(Reader::OpenException, (tag));
 }
 
+bool FilesContainerR::IsReaderExist(Tag const & tag) const
+{
+  InfoContainer::const_iterator i =
+    lower_bound(m_info.begin(), m_info.end(), tag, LessInfo());
+
+  return (i != m_info.end() && i->m_tag == tag);
+}
+
 /////////////////////////////////////////////////////////////////////////////
 // FilesContainerW
 /////////////////////////////////////////////////////////////////////////////
diff --git a/coding/file_container.hpp b/coding/file_container.hpp
index 30d231bc76..3b877608bf 100644
--- a/coding/file_container.hpp
+++ b/coding/file_container.hpp
@@ -90,6 +90,8 @@ public:
 
   ReaderT GetReader(Tag const & tag) const;
 
+  bool IsReaderExist(Tag const & tag) const;
+
   template <typename F> void ForEachTag(F f) const
   {
     for (size_t i = 0; i < m_info.size(); ++i)