diff --git a/src/keel/CMakeLists.txt b/src/keel/CMakeLists.txt
index ce01e383..f9fbca2f 100644
--- a/src/keel/CMakeLists.txt
+++ b/src/keel/CMakeLists.txt
@@ -9,6 +9,10 @@ add_library(
 		typestore.cpp
 )
 
+if(NOT MSVC)
+	target_compile_options(Keel PRIVATE -Wsign-conversion)
+endif()
+
 target_link_libraries(
 	Keel PUBLIC
 		OxClaw
diff --git a/src/keel/asset.cpp b/src/keel/asset.cpp
index ce324ef2..913f66af 100644
--- a/src/keel/asset.cpp
+++ b/src/keel/asset.cpp
@@ -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 : K1HdrSz;
+	const auto offset = err ? 0u : K1HdrSz;
 	buff = buff + offset;
 	buffLen = buffLen - offset;
 	oxReturnError(ox::readClawHeader(buff, buffLen).moveTo(&out.clawHdr));