diff --git a/docopt.h b/docopt.h
index 4c40741..06a04f8 100644
--- a/docopt.h
+++ b/docopt.h
@@ -85,6 +85,9 @@ namespace docopt {
 					    bool help = true,
 					    std::string const& version = {},
 					    bool options_first = false) noexcept;
+
+	/// Write out the contents to the ostream
+	std::ostream DOCOPT_API & operator<<(std::ostream&, value const&);
 }
 
 #ifdef DOCOPT_HEADER_ONLY
diff --git a/docopt_value.h b/docopt_value.h
index a923219..7f0d6d6 100644
--- a/docopt_value.h
+++ b/docopt_value.h
@@ -102,9 +102,6 @@ namespace docopt {
 		Kind kind = Kind::Empty;
 		Variant variant {};
 	};
-
-	/// Write out the contents to the ostream
-	std::ostream& operator<<(std::ostream&, value const&);
 }
 
 namespace std {
