diff --git a/include/fc/variant.hpp b/include/fc/variant.hpp
index 3e7b095..ed91ffe 100644
--- a/include/fc/variant.hpp
+++ b/include/fc/variant.hpp
@@ -322,6 +322,15 @@ namespace fc
           vars[i] = variant(t[i]);
        v = vars;
    }
+   /** @ingroup Serializable */
+   template<typename A, typename B>
+   void to_variant( const std::pair<A,B>& t, variant& v )
+   {
+      std::vector<variant> vars(2);
+      vars[0] = variant(t.first);
+      vars[1] = variant(t.second);
+       v = vars;
+   }
 
 
    template<typename T>
diff --git a/src/crypto/ripemd160.cpp b/src/crypto/ripemd160.cpp
index 576b323..ed3671a 100644
--- a/src/crypto/ripemd160.cpp
+++ b/src/crypto/ripemd160.cpp
@@ -26,6 +26,10 @@ char* ripemd160::data()const { return (char*)&_hash[0]; }
 
 
 struct ripemd160::encoder::impl {
+   impl()
+   {
+        memset( (char*)&ctx, 0, sizeof(ctx) );
+   }
    RIPEMD160_CTX ctx;
 };