diff --git a/headers/private/libroot/libroot_private.h b/headers/private/libroot/libroot_private.h
new file mode 100644
index 0000000000..ceb4697174
--- /dev/null
+++ b/headers/private/libroot/libroot_private.h
@@ -0,0 +1,13 @@
+#ifndef LIBROOT_PRIVATE_H
+#define LIBROOT_PRIVATE_H
+/*
+** Copyright 2004, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+
+
+extern char _single_threaded;
+	/* This determines if a process runs single threaded or not */
+
+
+#endif	/* LIBROOT_PRIVATE_H */