diff --git a/src/base58.h b/src/base58.h
index f2603e6f6..53d13d704 100644
--- a/src/base58.h
+++ b/src/base58.h
@@ -18,6 +18,8 @@
 #include <string>
 #include <algorithm>
 #include <vector>
+#include <boost/foreach.hpp>
+#include <boost/functional/hash.hpp>
 
 #include "bignum.h"
 #include "BitcoinUtil.h"
@@ -241,7 +243,21 @@ public:
     bool operator>=(const CBase58Data& b58) const { return CompareTo(b58) >= 0; }
     bool operator< (const CBase58Data& b58) const { return CompareTo(b58) <  0; }
     bool operator> (const CBase58Data& b58) const { return CompareTo(b58) >  0; }
+
+	friend std::size_t hash_value(CBase58Data const& b58);
 };
 
+inline std::size_t hash_value(CBase58Data const& b58)
+{
+	std::size_t seed = 0;
+
+	boost::hash_combine(seed, b58.nVersion);
+	BOOST_FOREACH(const unsigned char& x, b58.vchData)
+	{
+		boost::hash_combine(seed, x);
+	}
+
+	return seed;
+}
 #endif
 // vim:ts=4