diff --git a/Userspace/libc/include/stdio.h b/Userspace/libc/include/stdio.h
index 1fa695f4..5377c645 100644
--- a/Userspace/libc/include/stdio.h
+++ b/Userspace/libc/include/stdio.h
@@ -78,6 +78,10 @@ extern "C"
 	extern FILE *stdout;
 	extern FILE *stderr;
 
+#define STDIN_FILENO 0
+#define STDOUT_FILENO 1
+#define STDERR_FILENO 2
+
 #define stdin stdin
 #define stdout stdout
 #define stderr stderr