diff --git a/Chaos/Cipher/Block/Des/DesCrypt.hpp b/Chaos/Cipher/Block/Des/DesCrypt.hpp
index 06c83fe..8459b19 100644
--- a/Chaos/Cipher/Block/Des/DesCrypt.hpp
+++ b/Chaos/Cipher/Block/Des/DesCrypt.hpp
@@ -82,15 +82,6 @@ struct Bitwise
         return result;
     }
 
-    template<typename OutputIt>
-    static void CrunchUInt64(OutputIt out, uint64_t value)
-    {
-        for (int_fast8_t i = 0; i < 8; ++i)
-        {
-            *out++ = (value >> (56 - (i * 8))) & Mask<8>();
-        }
-    }
-
     template<typename OutputIt>
     static void CrunchUInt64(OutputIt outBegin, OutputIt outEnd, uint64_t value)
     {