diff --git a/contrib/msi/build-msi.sh b/contrib/msi/build-msi.sh
index ada543cc..72d61070 100644
--- a/contrib/msi/build-msi.sh
+++ b/contrib/msi/build-msi.sh
@@ -98,6 +98,15 @@ cat > wix.xml << EOF
       Platform="${PKGARCH}"
       SummaryCodepage="1252" />
 
+    <Upgrade Id="${PKGGUID}">
+      <UpgradeVersion
+        Minimum="0.0.0.0"
+        Maximum="99.0.0.0"
+        Property="PREVIOUSVERSIONSINSTALLED"
+        IncludeMinimum="yes"
+        IncludeMaximum="no" />
+    </Upgrade>
+
     <Media
       Id="1"
       Cabinet="Media.cab"