diff --git a/src/cuda/api/library.hpp b/src/cuda/api/library.hpp
index 26f4294c..0b8d93e6 100644
--- a/src/cuda/api/library.hpp
+++ b/src/cuda/api/library.hpp
@@ -264,7 +264,7 @@ library_t create(
 	bool                    code_is_preserved = false)
 {
 	handle_t new_lib_handle;
-	auto raw_link_opts = marshal(link_options);
+	auto raw_link_opts = link::detail_::marshal(link_options);
 	struct {
 		detail_::option_t options[1];
 		void* values[1];
@@ -272,7 +272,7 @@ library_t create(
 	} raw_opts = { { CU_LIBRARY_BINARY_IS_PRESERVED }, { &code_is_preserved }, 1 };
 	auto status = creator(
 		&new_lib_handle, data_source,
-		const_cast<link::option_t*>(raw_link_opts.options()),
+		const_cast<link::detail_::option_t*>(raw_link_opts.options()),
 		const_cast<void**>(raw_link_opts.values()), raw_link_opts.count(),
 		raw_opts.options, raw_opts.values, raw_opts.count
 	);
diff --git a/src/cuda/api/link.hpp b/src/cuda/api/link.hpp
index f2686b31..ef55571e 100644
--- a/src/cuda/api/link.hpp
+++ b/src/cuda/api/link.hpp
@@ -118,7 +118,7 @@ class link_t {
 	// TODO: Replace this with methods which take wrapper classes.
 	void add(link::input::image_t image, const link::options_t &ptx_compilation_options = {}) const
 	{
-		auto marshalled_options = marshal(ptx_compilation_options);
+		auto marshalled_options = link::detail_::marshal(ptx_compilation_options);
 		auto status = cuLinkAddData(
 			handle_,
 			static_cast<CUjitInputType>(image.type),
@@ -126,7 +126,7 @@ class link_t {
 			image.size(),
 			image.name,
 			marshalled_options.count(),
-			const_cast<link::option_t *>(marshalled_options.options()),
+			const_cast<link::detail_::option_t *>(marshalled_options.options()),
 			const_cast<void **>(marshalled_options.values())
 		);
 		throw_if_error_lazy(status,
@@ -136,13 +136,13 @@ class link_t {
 
 	void add_file(link::input::file_t file_input, const link::options_t &options) const
 	{
-		auto marshalled_options = marshal(options);
+		auto marshalled_options = link::detail_::marshal(options);
 		auto status = cuLinkAddFile(
 			handle_,
 			static_cast<CUjitInputType_enum>(file_input.type),
 			file_input.path,
 			marshalled_options.count(),
-			const_cast<link::option_t *>(marshalled_options.options()),
+			const_cast<link::detail_::option_t *>(marshalled_options.options()),
 			const_cast<void **>(marshalled_options.values())
 		);
 		throw_if_error_lazy(status,
@@ -222,10 +222,10 @@ namespace link {
 inline link_t create(const link::options_t &options = link::options_t{})
 {
 	handle_t new_link_handle;
-	auto marshalled_options = marshal(options);
+	auto marshalled_options = link::detail_::marshal(options);
 	auto status = cuLinkCreate(
 		marshalled_options.count(),
-		const_cast<link::option_t *>(marshalled_options.options()),
+		const_cast<link::detail_::option_t *>(marshalled_options.options()),
 		const_cast<void **>(marshalled_options.values()),
 		&new_link_handle
 	);
diff --git a/src/cuda/api/link_options.hpp b/src/cuda/api/link_options.hpp
index 56bad9e8..eaa7f47b 100644
--- a/src/cuda/api/link_options.hpp
+++ b/src/cuda/api/link_options.hpp
@@ -26,6 +26,8 @@ enum fallback_strategy_for_binary_code_t {
 	prefer_using_compatible_binary  = 1,
 };
 
+namespace detail_ {
+
 using option_t = CUjit_option;
 
 struct marshalled_options_t {
@@ -87,6 +89,8 @@ struct marshalled_options_t {
 	const void * const * values() const { return value_buffer.data(); }
 };
 
+} // namespace detail_
+
 struct options_t final : public rtc::common_ptx_compilation_options_t {
 
 	// Note: The sizes are used as parameters too.
@@ -116,6 +120,8 @@ struct options_t final : public rtc::common_ptx_compilation_options_t {
 
 };
 
+namespace detail_ {
+
 inline marshalled_options_t marshal(const options_t& link_options)
 {
 	marshalled_options_t marshalled{};
@@ -177,6 +183,8 @@ inline marshalled_options_t marshal(const options_t& link_options)
 	return marshalled;
 }
 
+} // namespace detail_
+
 // TODO: Compiler "output options":
 //
 // threads per block targeted
diff --git a/src/cuda/api/multi_wrapper_impls/module.hpp b/src/cuda/api/multi_wrapper_impls/module.hpp
index bb2b0c0e..eb281544 100644
--- a/src/cuda/api/multi_wrapper_impls/module.hpp
+++ b/src/cuda/api/multi_wrapper_impls/module.hpp
@@ -75,12 +75,12 @@ inline module_t create(const context_t& context, const void* module_data, const
 {
 	auto creator_function =
 		[&link_options](handle_t& new_module_handle, const void* module_data_) {
-			auto marshalled_options = marshal(link_options);
+			auto marshalled_options = link::detail_::marshal(link_options);
 			return cuModuleLoadDataEx(
 				&new_module_handle,
 				module_data_,
 				marshalled_options.count(),
-				const_cast<link::option_t *>(marshalled_options.options()),
+				const_cast<link::detail_::option_t *>(marshalled_options.options()),
 				const_cast<void **>(marshalled_options.values())
 			);
 		};