diff --git a/testsuites/aclocal/rtems-top.m4 b/testsuites/aclocal/rtems-top.m4
index 855ceb91b5..1c96a2e9e6 100644
--- a/testsuites/aclocal/rtems-top.m4
+++ b/testsuites/aclocal/rtems-top.m4
@@ -80,6 +80,4 @@ project_rootdir=
 PROJECT_ROOT=
 ])
 AC_SUBST([PROJECT_ROOT])
-
-AC_SUBST([dirstamp],[\${am__leading_dot}dirstamp])
 ])dnl