diff --git a/database/rrdtool/rrdtool.conf b/database/rrdtool/rrdtool.conf
index 8f2a4885a..cff246d9f 100644
--- a/database/rrdtool/rrdtool.conf
+++ b/database/rrdtool/rrdtool.conf
@@ -14,6 +14,7 @@
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
 
+var_append configcache ' ' "rd_cv_ms_async=ok"
 var_append extraconfopt " " "--enable-shared"
 
 # tcl support