diff --git a/emory/chunk/ostream.cpp b/emory/chunk/ostream.cpp
index 1856fb4..eed6201 100644
--- a/emory/chunk/ostream.cpp
+++ b/emory/chunk/ostream.cpp
@@ -3,17 +3,30 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  *
- * Copyright 2019, Danny Robson <danny@nerdcruft.net>
+ * Copyright 2019-2020, Danny Robson <danny@nerdcruft.net>
  */
 
 #include "ostream.hpp"
 
+#include "params.hpp"
 #include "region.hpp"
 #include "match.hpp"
 
 #include <ostream>
 #include <iomanip>
 
+
+///////////////////////////////////////////////////////////////////////////////
+std::ostream&
+emory::chunk::operator<< (std::ostream &os, params const &val)
+{
+    return os << "{ bits: "    << val.bits
+              << ", window: "  << val.window
+              << ", minimum: " << val.minimum
+              << " }";
+}
+
+
 ///////////////////////////////////////////////////////////////////////////////
 std::ostream&
 emory::chunk::operator<< (std::ostream &os, region const &val)
diff --git a/emory/chunk/ostream.hpp b/emory/chunk/ostream.hpp
index 93f5316..84711c4 100644
--- a/emory/chunk/ostream.hpp
+++ b/emory/chunk/ostream.hpp
@@ -3,7 +3,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  *
- * Copyright 2019, Danny Robson <danny@nerdcruft.net>
+ * Copyright 2019-2020, Danny Robson <danny@nerdcruft.net>
  */
 
 #pragma once
@@ -14,6 +14,8 @@
 
 
 namespace emory::chunk {
+    std::ostream& operator<< (std::ostream&, params const&);
+
     std::ostream& operator<< (std::ostream &, region const &);