diff --git a/hex.h b/hex.h
index 1acc0903..2668b62c 100644
--- a/hex.h
+++ b/hex.h
@@ -1,6 +1,6 @@
 // hex.h - written and placed in the public domain by Wei Dai
 
-//! \file
+//! \file hex.h
 //! \brief Classes for HexEncoder and HexDecoder
 
 #ifndef CRYPTOPP_HEX_H
@@ -11,10 +11,17 @@
 
 NAMESPACE_BEGIN(CryptoPP)
 
-//! Converts given data to base 16
+//! \class HexEncoder
+//! \brief Converts given data to base 16
 class CRYPTOPP_DLL HexEncoder : public SimpleProxyFilter
 {
 public:
+	//! \brief Construct a HexEncoder
+	//! \param attachment a BufferedTrasformation to attach to this object
+	//! \param uppercase a flag indicating uppercase output
+	//! \param groupSize the size of the grouping
+	//! \param separator the separator to use between groups
+	//! \param terminator the terminator append after processing
 	HexEncoder(BufferedTransformation *attachment = NULL, bool uppercase = true, int outputGroupSize = 0, const std::string &separator = ":", const std::string &terminator = "")
 		: SimpleProxyFilter(new BaseN_Encoder(new Grouper), attachment)
 	{
@@ -24,10 +31,13 @@ public:
 	void IsolatedInitialize(const NameValuePairs &parameters);
 };
 
-//! Decode base 16 data back to bytes
+//! \class HexDecoder
+//! \brief Decode base 16 data back to bytes
 class CRYPTOPP_DLL HexDecoder : public BaseN_Decoder
 {
 public:
+	//! \brief Construct a HexDecoder
+	//! \param attachment a BufferedTrasformation to attach to this object
 	HexDecoder(BufferedTransformation *attachment = NULL)
 		: BaseN_Decoder(GetDefaultDecodingLookupArray(), 4, attachment) {}