diff --git a/kernel/inc/proc/file_descriptor.h b/kernel/inc/proc/file_descriptor.h
index ffb74af..6a2bd49 100644
--- a/kernel/inc/proc/file_descriptor.h
+++ b/kernel/inc/proc/file_descriptor.h
@@ -9,10 +9,15 @@
 
 #define FILE_DESCRIPTOR_ARRAY_CHUNK_SIZE 32
 
-typedef int32_t file_descriptor_t;
+typedef uint32_t file_descriptor_t;
 
 typedef enum {
-    FILE_DESCRIPTOR_INVALID = -1
+    FILE_DESCRIPTOR_INVALID,
+    FILE_DESCRIPTOR_STDOUT,
+    FILE_DESCRIPTOR_STDIN,
+    FILE_DESCRIPTOR_STDERR,
+
+    FILE_DESCRIPTORS_ENUM_END
 } std_file_descriptors_E;
 
 typedef struct file_descriptor_array_chunk_T file_descriptor_array_chunk_T;
diff --git a/kernel/src/proc/file_descriptor.c b/kernel/src/proc/file_descriptor.c
index d607b76..eef4974 100644
--- a/kernel/src/proc/file_descriptor.c
+++ b/kernel/src/proc/file_descriptor.c
@@ -5,7 +5,7 @@
 
 
 file_descriptor_t file_descriptor_request(file_descriptor_array_T* fd_array, vfs_node_T* node) {
-    file_descriptor_t fd = 0;
+    file_descriptor_t fd = FILE_DESCRIPTORS_ENUM_END;
 
     file_descriptor_array_chunk_T* chunk = fd_array->base_chunk;
     while (chunk->amount == FILE_DESCRIPTOR_ARRAY_CHUNK_SIZE) {
@@ -30,8 +30,9 @@ file_descriptor_t file_descriptor_request(file_descriptor_array_T* fd_array, vfs
 }
 
 vfs_node_T* file_descriptor_resolve(file_descriptor_array_T* fd_array, file_descriptor_t fd) {
-    if (fd == FILE_DESCRIPTOR_INVALID) return NULL;
+    if (fd < FILE_DESCRIPTORS_ENUM_END) return NULL;
 
+    fd -= FILE_DESCRIPTORS_ENUM_END;
 
     uint32_t chunk_selector = fd / FILE_DESCRIPTOR_ARRAY_CHUNK_SIZE;
     file_descriptor_array_chunk_T* chunk = fd_array->base_chunk;
@@ -49,7 +50,9 @@ vfs_node_T* file_descriptor_resolve(file_descriptor_array_T* fd_array, file_desc
 }
 
 void file_descriptor_free(file_descriptor_array_T* fd_array, file_descriptor_t fd) {
-    if (fd == FILE_DESCRIPTOR_INVALID) return;
+    if (fd < FILE_DESCRIPTORS_ENUM_END) return;
+
+    fd -= FILE_DESCRIPTORS_ENUM_END;
 
     uint32_t chunk_selector = fd / FILE_DESCRIPTOR_ARRAY_CHUNK_SIZE;
     file_descriptor_array_chunk_T* chunk = fd_array->base_chunk;