diff --git a/EgnFileCompare.h b/EgnFileCompare.h
index 2d7c26d..83eb596 100644
--- a/EgnFileCompare.h
+++ b/EgnFileCompare.h
@@ -27,4 +27,6 @@
 //-----------------------------------------------------------------------------
 EGN_EXPORT bool TextFileCompare( const std::string& sFile1, const std::string& sFile2,
                                  const std::string& sRemIni, const std::string& sFileO) ;
+EGN_EXPORT bool BinaryFileCompare( const std::string& sFile1, const std::string& sFile2,
+                                   const std::string& sFileO) ;