diff --git a/contrib/msi/build-msi.sh b/contrib/msi/build-msi.sh
index 3f80487d..358fb775 100644
--- a/contrib/msi/build-msi.sh
+++ b/contrib/msi/build-msi.sh
@@ -185,6 +185,9 @@ cat > wix.xml << EOF
     </Feature>
 
     <Feature Id="WintunFeature" Title="Wintun" Level="1">
+      <Condition Level="0">
+        NOT UPGRADINGPRODUCTCODE
+      </Condition>
       <MergeRef Id="Wintun" />
     </Feature>