diff --git a/src/beast/beast/utility/PropertyStream.h b/src/beast/beast/utility/PropertyStream.h
index 8fc938f98..830490984 100644
--- a/src/beast/beast/utility/PropertyStream.h
+++ b/src/beast/beast/utility/PropertyStream.h
@@ -62,6 +62,7 @@ protected:
     virtual void add (std::string const& key,  uint32 value);
     virtual void add (std::string const& key,   int64 value);
     virtual void add (std::string const& key,  uint64 value);
+    virtual void add (std::string const& key,  double value);
 
     virtual void array_begin () = 0;
     virtual void array_begin (std::string const& key) = 0;
diff --git a/src/beast/beast/utility/impl/PropertyStream.cpp b/src/beast/beast/utility/impl/PropertyStream.cpp
index 24491ae98..ead9849f8 100644
--- a/src/beast/beast/utility/impl/PropertyStream.cpp
+++ b/src/beast/beast/utility/impl/PropertyStream.cpp
@@ -390,6 +390,11 @@ void PropertyStream::add (std::string const& key, int64 value)
     }
 }
 
+void PropertyStream::add (std::string const& key, double value)
+{
+    lexical_add (key, value);
+}
+
 void PropertyStream::add (std::string const& key, uint64 value)
 {
     if (value <= std::numeric_limits <uint32>::max() &&
diff --git a/src/ripple/types/api/JsonPropertyStream.h b/src/ripple/types/api/JsonPropertyStream.h
index 8f420f024..92d66188c 100644
--- a/src/ripple/types/api/JsonPropertyStream.h
+++ b/src/ripple/types/api/JsonPropertyStream.h
@@ -40,6 +40,7 @@ protected:
     void map_end ();
     void add (std::string const& key, int32 v);
     void add (std::string const& key, uint32 v);
+    void add (std::string const& key, double v);
     void add (std::string const& key, std::string const& v);
     void array_begin ();
     void array_begin (std::string const& key);
diff --git a/src/ripple/types/impl/JsonPropertyStream.cpp b/src/ripple/types/impl/JsonPropertyStream.cpp
index c25f6fe61..485da459f 100644
--- a/src/ripple/types/impl/JsonPropertyStream.cpp
+++ b/src/ripple/types/impl/JsonPropertyStream.cpp
@@ -62,6 +62,11 @@ void JsonPropertyStream::add (std::string const& key, uint32 v)
     (*m_stack.back())[key] = v;
 }
 
+void JsonPropertyStream::add (std::string const& key, double v)
+{
+    (*m_stack.back())[key] = v;
+}
+
 void JsonPropertyStream::add (std::string const& key, std::string const& v)
 {
     (*m_stack.back())[key] = v;