diff --git a/c/src/ChangeLog b/c/src/ChangeLog
index 072399aac7..7e588f1639 100644
--- a/c/src/ChangeLog
+++ b/c/src/ChangeLog
@@ -1,5 +1,6 @@
 2011-03-07	Ralf Corsépius <ralf.corsepius@rtems.org>
 
+	* aclocal/rtems-top.m4: Add pkgdatadir.
 	* configure.ac: Remove dead code.
 
 2011-03-04	Ralf Corsépius <ralf.corsepius@rtems.org>
diff --git a/c/src/aclocal/rtems-top.m4 b/c/src/aclocal/rtems-top.m4
index 7a796ec0f4..74a3694b94 100644
--- a/c/src/aclocal/rtems-top.m4
+++ b/c/src/aclocal/rtems-top.m4
@@ -32,4 +32,5 @@ AC_SUBST([PROJECT_TOPdir],[${project_top}${rtems_updir}'$(top_builddir)'])
 AC_SUBST([PROJECT_ROOT],[${with_project_root}${rtems_updir}'$(top_builddir)'])
 
 AC_SUBST([dirstamp],[\${am__leading_dot}dirstamp])
+AC_SUBST([pkgdatadir],["\${datadir}"/rtems]_RTEMS_API)
 ])dnl