diff --git a/contrib/msi/build-msi.sh b/contrib/msi/build-msi.sh
index 836b7e5d..72c2c3e7 100644
--- a/contrib/msi/build-msi.sh
+++ b/contrib/msi/build-msi.sh
@@ -95,7 +95,7 @@ cat > wix.xml << EOF
       SummaryCodepage="1252" />
 
     <MajorUpgrade
-      AllowDowngrades="yes" />
+      AllowSameVersionUpgrades="yes" />
 
     <Media
       Id="1"