diff --git a/contrib/msi/build-msi.sh b/contrib/msi/build-msi.sh
index 358fb775..b6601968 100644
--- a/contrib/msi/build-msi.sh
+++ b/contrib/msi/build-msi.sh
@@ -186,7 +186,7 @@ cat > wix.xml << EOF
 
     <Feature Id="WintunFeature" Title="Wintun" Level="1">
       <Condition Level="0">
-        NOT UPGRADINGPRODUCTCODE
+        UPGRADINGPRODUCTCODE
       </Condition>
       <MergeRef Id="Wintun" />
     </Feature>