diff --git a/src/nostalgia/core/userland/CMakeLists.txt b/src/nostalgia/core/userland/CMakeLists.txt
index 48f8f1ab..8c559fdc 100644
--- a/src/nostalgia/core/userland/CMakeLists.txt
+++ b/src/nostalgia/core/userland/CMakeLists.txt
@@ -3,6 +3,8 @@ add_library(
 		media.cpp
 )
 
+target_compile_options(NostalgiaCore-Userspace PRIVATE -Wsign-conversion)
+
 target_link_libraries(
 	NostalgiaCore-Userspace PUBLIC
 		OxFS
diff --git a/src/nostalgia/core/userland/media.cpp b/src/nostalgia/core/userland/media.cpp
index 888dc65b..15cfde9f 100644
--- a/src/nostalgia/core/userland/media.cpp
+++ b/src/nostalgia/core/userland/media.cpp
@@ -21,7 +21,7 @@ char *loadRom(const char *path) {
 		return nullptr;
 	}
 
-	const std::size_t size = file.tellg();
+	const auto size = file.tellg();
 	file.seekg(0, std::ios::beg);
 	auto buff = new char[size];
 	file.read(buff, size);