diff --git a/tools/include/nolibc/unistd.h b/tools/include/nolibc/unistd.h
index 1cfcd52106a42..ac7d53d986cd1 100644
--- a/tools/include/nolibc/unistd.h
+++ b/tools/include/nolibc/unistd.h
@@ -13,6 +13,11 @@
 #include "sys.h"
 
 
+#define STDIN_FILENO  0
+#define STDOUT_FILENO 1
+#define STDERR_FILENO 2
+
+
 static __attribute__((unused))
 int msleep(unsigned int msecs)
 {