diff --git a/src/xenia/cpu/raw_module.cc b/src/xenia/cpu/raw_module.cc
index 9a4e1b8d8..f2289d995 100644
--- a/src/xenia/cpu/raw_module.cc
+++ b/src/xenia/cpu/raw_module.cc
@@ -26,9 +26,8 @@ RawModule::~RawModule() {}
 bool RawModule::LoadFile(uint32_t base_address,
                          const std::filesystem::path& path) {
   FILE* file = xe::filesystem::OpenFile(path, "rb");
-  fseek(file, 0, SEEK_END);
-  uint32_t file_length = static_cast<uint32_t>(ftell(file));
-  fseek(file, 0, SEEK_SET);
+  const uint32_t file_length =
+      static_cast<uint32_t>(std::filesystem::file_size(path));
 
   // Allocate memory.
   // Since we have no real heap just load it wherever.
diff --git a/src/xenia/gpu/shader_compiler_main.cc b/src/xenia/gpu/shader_compiler_main.cc
index 4fdcec736..d8c1f3a3b 100644
--- a/src/xenia/gpu/shader_compiler_main.cc
+++ b/src/xenia/gpu/shader_compiler_main.cc
@@ -100,9 +100,7 @@ int shader_compiler_main(const std::vector<std::string>& args) {
            xe::path_to_utf8(cvars::shader_input));
     return 1;
   }
-  fseek(input_file, 0, SEEK_END);
-  size_t input_file_size = ftell(input_file);
-  fseek(input_file, 0, SEEK_SET);
+  size_t input_file_size = std::filesystem::file_size(cvars::shader_input);
   std::vector<uint32_t> ucode_dwords(input_file_size / 4);
   fread(ucode_dwords.data(), 4, ucode_dwords.size(), input_file);
   fclose(input_file);
diff --git a/src/xenia/kernel/xam/content_manager.cc b/src/xenia/kernel/xam/content_manager.cc
index 5559feff9..f5168dad4 100644
--- a/src/xenia/kernel/xam/content_manager.cc
+++ b/src/xenia/kernel/xam/content_manager.cc
@@ -307,9 +307,7 @@ X_RESULT ContentManager::GetContentThumbnail(
   auto thumb_path = package_path / kThumbnailFileName;
   if (std::filesystem::exists(thumb_path)) {
     auto file = xe::filesystem::OpenFile(thumb_path, "rb");
-    fseek(file, 0, SEEK_END);
-    size_t file_len = ftell(file);
-    fseek(file, 0, SEEK_SET);
+    size_t file_len = std::filesystem::file_size(thumb_path);
     buffer->resize(file_len);
     fread(const_cast<uint8_t*>(buffer->data()), 1, buffer->size(), file);
     fclose(file);