diff --git a/scripts/win_installer/Product.wxs b/scripts/win_installer/Product.wxs
index 66de63a19d..645c5e70ad 100644
--- a/scripts/win_installer/Product.wxs
+++ b/scripts/win_installer/Product.wxs
@@ -21,7 +21,7 @@
       <Media Id="1" Cabinet="product.cab" EmbedCab="yes"/>
 
       <Upgrade Id="cd7955bc-304e-470f-9c24-eb9f429a8085">
-         <UpgradeVersion Minimum="1.3.15" OnlyDetect="yes" IncludeMaximum="yes" Property="NEWERVERSIONDETECTED"/>=
+         <UpgradeVersion Minimum="1.3.15" OnlyDetect="yes" IncludeMaximum="yes" Property="NEWERVERSIONDETECTED"/>
       </Upgrade>
       <Condition Message="A newer version of this software is already installed.">NEWERVERSIONDETECTED</Condition>