diff --git a/src/file_backend_native.mbt b/src/file_backend_native.mbt
index 2d2527d..b979044 100644
--- a/src/file_backend_native.mbt
+++ b/src/file_backend_native.mbt
@@ -1,37 +1,37 @@
-pub type FileHandle = @utils.FileHandle
+type FileHandle = @utils.FileHandle
 
-pub fn open_file_handle_internal(path : String, append : Bool) -> FileHandle? {
+fn open_file_handle_internal(path : String, append : Bool) -> FileHandle? {
   @utils.open_file_handle_internal(path, append)
 }
 
-pub fn write_file_handle_internal(handle : FileHandle, content : String) -> Bool {
+fn write_file_handle_internal(handle : FileHandle, content : String) -> Bool {
   @utils.write_file_handle_internal(handle, content)
 }
 
-pub fn flush_file_handle_internal(handle : FileHandle) -> Bool {
+fn flush_file_handle_internal(handle : FileHandle) -> Bool {
   @utils.flush_file_handle_internal(handle)
 }
 
-pub fn close_file_handle_internal(handle : FileHandle) -> Bool {
+fn close_file_handle_internal(handle : FileHandle) -> Bool {
   @utils.close_file_handle_internal(handle)
 }
 
-pub fn file_size_internal(handle : FileHandle) -> Int {
+fn file_size_internal(handle : FileHandle) -> Int {
   @utils.file_size_internal(handle)
 }
 
-pub fn rename_file_internal(from_path : String, to_path : String) -> Bool {
+fn rename_file_internal(from_path : String, to_path : String) -> Bool {
   @utils.rename_file_internal(from_path, to_path)
 }
 
-pub fn remove_file_internal(path : String) -> Bool {
+fn remove_file_internal(path : String) -> Bool {
   @utils.remove_file_internal(path)
 }
 
-pub fn string_byte_length_internal(content : String) -> Int {
+fn string_byte_length_internal(content : String) -> Int {
   @utils.string_byte_length_internal(content)
 }
 
-pub fn native_files_supported_internal() -> Bool {
+fn native_files_supported_internal() -> Bool {
   @utils.native_files_supported_internal()
 }
diff --git a/src/file_backend_stub.mbt b/src/file_backend_stub.mbt
index 2d2527d..b979044 100644
--- a/src/file_backend_stub.mbt
+++ b/src/file_backend_stub.mbt
@@ -1,37 +1,37 @@
-pub type FileHandle = @utils.FileHandle
+type FileHandle = @utils.FileHandle
 
-pub fn open_file_handle_internal(path : String, append : Bool) -> FileHandle? {
+fn open_file_handle_internal(path : String, append : Bool) -> FileHandle? {
   @utils.open_file_handle_internal(path, append)
 }
 
-pub fn write_file_handle_internal(handle : FileHandle, content : String) -> Bool {
+fn write_file_handle_internal(handle : FileHandle, content : String) -> Bool {
   @utils.write_file_handle_internal(handle, content)
 }
 
-pub fn flush_file_handle_internal(handle : FileHandle) -> Bool {
+fn flush_file_handle_internal(handle : FileHandle) -> Bool {
   @utils.flush_file_handle_internal(handle)
 }
 
-pub fn close_file_handle_internal(handle : FileHandle) -> Bool {
+fn close_file_handle_internal(handle : FileHandle) -> Bool {
   @utils.close_file_handle_internal(handle)
 }
 
-pub fn file_size_internal(handle : FileHandle) -> Int {
+fn file_size_internal(handle : FileHandle) -> Int {
   @utils.file_size_internal(handle)
 }
 
-pub fn rename_file_internal(from_path : String, to_path : String) -> Bool {
+fn rename_file_internal(from_path : String, to_path : String) -> Bool {
   @utils.rename_file_internal(from_path, to_path)
 }
 
-pub fn remove_file_internal(path : String) -> Bool {
+fn remove_file_internal(path : String) -> Bool {
   @utils.remove_file_internal(path)
 }
 
-pub fn string_byte_length_internal(content : String) -> Int {
+fn string_byte_length_internal(content : String) -> Int {
   @utils.string_byte_length_internal(content)
 }
 
-pub fn native_files_supported_internal() -> Bool {
+fn native_files_supported_internal() -> Bool {
   @utils.native_files_supported_internal()
 }