diff --git a/content/projects/noxos/docs/codebase/proc/file_descriptor.h.md b/content/projects/noxos/docs/codebase/proc/file_descriptor.h.md
index db95a39..bddf123 100644
--- a/content/projects/noxos/docs/codebase/proc/file_descriptor.h.md
+++ b/content/projects/noxos/docs/codebase/proc/file_descriptor.h.md
@@ -15,6 +15,9 @@ This is a typedef of `ìnt32_t` and represents a file descriptor.
 # `std_file_descriptors_E` - enum
 These are reserved file descriptors.
 * `FILE_DESCRIPTOR_INVALID` - This represents an invalid file descriptor, just like NULL is an invalid pointer.
+* `FILE_DESCRIPTOR_STDOUT` - This represents the file descriptor that is used, when writing to the Standard-Output stream.
+* `FILE_DESCRIPTOR_STDIN` - This represents the file descriptor that is used, when reading from the Standard-Input stream.
+* `FILE_DESCRIPTOR_STDERR` - This represents the file descriptor that is used, when writing to the Standard-Error stream.
 
 # `file_descriptor_array_chunk_T` - struct
 | Name   | Type                                           | Description                                                                            |