diff --git a/ostream.cpp b/ostream.cpp
index f51861d..6543377 100644
--- a/ostream.cpp
+++ b/ostream.cpp
@@ -135,27 +135,12 @@ operator<< (std::ostream &os, const VkPhysicalDeviceFeatures &f)
 std::ostream&
 cruft::vk::operator<< (std::ostream &os, const physical_device &d)
 {
-    os << "physical_device { ";
-
-    os << "extensions: [ ";
-    const auto &extensions = d.extensions ();
-    std::copy (std::cbegin (extensions),
-               std::cend   (extensions),
-               util::infix_iterator<std::string> (os, ", "));
-    os << " ], ";
-
-    os << " properties: " << d.properties ()
-       << ", features: " << d.features ();
-
-    os << ", queues: ";
-    const auto &queues = d.queue_families ();
-    std::copy (
-        std::cbegin (queues),
-        std::cend (queues),
-        util::infix_iterator<VkQueueFamilyProperties> (os, ", ")
-    );
-
-    return os << "}";
+    return os << "physical_device { "
+              << "extensions: [ " << util::make_infix (d.extensions ()) << " ]"
+              << ", properties: " << d.properties ()
+              << ", features: " << d.features ()
+              << ", queues: [ " << util::make_infix (d.queue_families ()) << " ]"
+              << " }";
 }