diff --git a/src/keel/asset.cpp b/src/keel/asset.cpp
index 87ba8ab9..340284ba 100644
--- a/src/keel/asset.cpp
+++ b/src/keel/asset.cpp
@@ -11,10 +11,10 @@ ox::Result<ox::UUID> readUuidHeader(const ox::Buffer &buff) noexcept {
 }
 
 ox::Result<ox::UUID> readUuidHeader(const char *buff, std::size_t buffLen) noexcept {
-	if (buffLen < N1HdrSz) {
+	if (buffLen < K1HdrSz) {
 		return OxError(1, "Insufficient data to contain complete Nostalgia header");
 	}
-	ox::StringView n1Hdr = "N1;";
+	ox::StringView n1Hdr = "K1;";
 	if (n1Hdr == buff) {
 		return OxError(2, "No Nostalgia asset header data");
 	}
@@ -24,7 +24,7 @@ ox::Result<ox::UUID> readUuidHeader(const char *buff, std::size_t buffLen) noexc
 ox::Result<ox::ModelObject> readAsset(ox::TypeStore *ts, const ox::Buffer &buff) noexcept {
 	std::size_t offset = 0;
 	if (!readUuidHeader(buff).error) {
-		offset = N1HdrSz;
+		offset = K1HdrSz;
 	}
 	return ox::readClaw(ts, buff.data() + offset, buff.size() - offset);
 }
@@ -32,7 +32,7 @@ ox::Result<ox::ModelObject> readAsset(ox::TypeStore *ts, const ox::Buffer &buff)
 ox::Result<AssetHdr> readAssetHeader(const char *buff, std::size_t buffLen) noexcept {
 	AssetHdr out;
 	const auto err = readUuidHeader(buff, buffLen).moveTo(&out.uuid);
-	const auto offset = err ? 0 : N1HdrSz;
+	const auto offset = err ? 0 : K1HdrSz;
 	buff = buff + offset;
 	buffLen = buffLen - offset;
 	oxReturnError(ox::readClawHeader(buff, buffLen).moveTo(&out.clawHdr));
diff --git a/src/keel/asset.hpp b/src/keel/asset.hpp
index 331f6640..0de3d200 100644
--- a/src/keel/asset.hpp
+++ b/src/keel/asset.hpp
@@ -11,14 +11,14 @@
 
 namespace keel {
 
-constexpr auto N1HdrSz = 40;
+constexpr auto K1HdrSz = 40;
 
 ox::Result<ox::UUID> readUuidHeader(const ox::Buffer &buff) noexcept;
 
 ox::Result<ox::UUID> readUuidHeader(const char *buff, std::size_t buffLen) noexcept;
 
 ox::Error writeUuidHeader(ox::Writer_c auto *writer, const ox::UUID &uuid) noexcept {
-	const auto hdr = ox::sfmt<ox::BString<N1HdrSz>>("N1;{};", uuid.toString());
+	const auto hdr = ox::sfmt<ox::BString<K1HdrSz>>("K1;{};", uuid.toString());
 	return write(writer, hdr);
 }
 
@@ -27,7 +27,7 @@ ox::Result<T> readAsset(const ox::Buffer &buff) noexcept {
 	std::size_t offset = 0;
 	const auto err = readUuidHeader(buff).error;
 	if (!err) {
-		offset = N1HdrSz; // the size of N1 headers
+		offset = K1HdrSz; // the size of K1 headers
 	}
 	return ox::readClaw<T>(buff.data() + offset, buff.size() - offset);
 }
diff --git a/src/keel/pack.hpp b/src/keel/pack.hpp
index 2369622f..d6bc4427 100644
--- a/src/keel/pack.hpp
+++ b/src/keel/pack.hpp
@@ -8,10 +8,8 @@
 #include <ox/preloader/preloader.hpp>
 
 namespace keel {
-class Context;
-}
 
-namespace keel {
+class Context;
 
 struct GbaPlatSpec {
 	using PtrType = uint32_t;
diff --git a/src/keel/typeconv.hpp b/src/keel/typeconv.hpp
index 6cc70d0a..e154fb29 100644
--- a/src/keel/typeconv.hpp
+++ b/src/keel/typeconv.hpp
@@ -10,8 +10,8 @@
 #include <ox/claw/read.hpp>
 #include <ox/claw/write.hpp>
 
+#include "asset.hpp"
 #include "context.hpp"
-#include "media.hpp"
 
 namespace keel {
 
diff --git a/src/nostalgia/player/app.cpp b/src/nostalgia/player/app.cpp
index e06a26c7..08404898 100644
--- a/src/nostalgia/player/app.cpp
+++ b/src/nostalgia/player/app.cpp
@@ -2,6 +2,8 @@
  * Copyright 2016 - 2023 Gary Talent (gary@drinkingtea.net). All rights reserved.
  */
 
+#include <keel/media.hpp>
+
 #include <nostalgia/core/core.hpp>
 #include <nostalgia/scene/scene.hpp>
 
diff --git a/src/nostalgia/player/main.cpp b/src/nostalgia/player/main.cpp
index 552c7bec..5417ceb6 100644
--- a/src/nostalgia/player/main.cpp
+++ b/src/nostalgia/player/main.cpp
@@ -4,6 +4,8 @@
 
 #include <ox/logconn/logconn.hpp>
 
+#include <keel/media.hpp>
+
 #include <nostalgia/core/core.hpp>
 
 #include <nostalgia/appmodules/appmodules.hpp>
diff --git a/src/nostalgia/tools/pack.cpp b/src/nostalgia/tools/pack.cpp
index 41ea2b81..baec38df 100644
--- a/src/nostalgia/tools/pack.cpp
+++ b/src/nostalgia/tools/pack.cpp
@@ -9,6 +9,7 @@
 #include <ox/logconn/logconn.hpp>
 
 #include <keel/keel.hpp>
+
 #include <nostalgia/appmodules/appmodules.hpp>
 #include <nostalgia/core/typestore.hpp>