diff --git a/beast/utility/PropertyStream.h b/beast/utility/PropertyStream.h
index 8fc938f98d..830490984f 100644
--- a/beast/utility/PropertyStream.h
+++ b/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/beast/utility/impl/PropertyStream.cpp b/beast/utility/impl/PropertyStream.cpp
index 24491ae981..ead9849f89 100644
--- a/beast/utility/impl/PropertyStream.cpp
+++ b/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() &&