diff --git a/meta/recipes-extended/sysstat/sysstat.inc b/meta/recipes-extended/sysstat/sysstat.inc
index 7f4749f571..6b21c6b8c1 100644
--- a/meta/recipes-extended/sysstat/sysstat.inc
+++ b/meta/recipes-extended/sysstat/sysstat.inc
@@ -10,6 +10,7 @@ SRC_URI = "http://pagesperso-orange.fr/sebastien.godard/sysstat-${PV}.tar.xz \
           "
 
 UPSTREAM_CHECK_URI = "http://sebastien.godard.pagesperso-orange.fr/download.html"
+UPSTREAM_VERSION_UNKNOWN = "1"
 
 DEPENDS += "base-passwd"