diff --git a/doc/obsolete/define_include_dirs b/doc/obsolete/define_include_dirs
new file mode 100644
index 0000000..4436308
--- /dev/null
+++ b/doc/obsolete/define_include_dirs
@@ -0,0 +1,24 @@
+
+   *****************************************************************
+   * ACHTUNG: WIRD VOM DRIVER NICHT MEHR GERUFEN! NICHT VERWENDEN! *
+   *****************************************************************
+
+SYNOPSIS
+	string *define_include_dirs(void)
+
+DESCRIPTION
+	Return an array of string patterns giving the absolut paths
+	where to search an include file. The patterns have to have a
+	%s at the place where the name given in the #include statement
+	has to be inserted.
+
+EXAMPLE
+	define_include_dirs() { return ({ "sys/%s", "lib/%s" }); }
+
+HISTORY
+	Dropped in 3.2.1, replaced by H_INCLUDE_DIRS hook.
+
+SEE ALSO
+	master(M)
+
+29.10.2006 Zesstra