diff --git a/util/installer/Installer32.wxs b/util/installer/Installer32.wxs
index 904bbe2ce..c10748689 100644
--- a/util/installer/Installer32.wxs
+++ b/util/installer/Installer32.wxs
@@ -13,6 +13,8 @@
 
     <Property Id="MajorMinorVersion">$(env.RENDERDOC_VERSION)</Property>
 
+    <Property Id="REINSTALLMODE" Value="amus"/> 
+
     <CustomAction Id="Need64BitVersion" Error="25000" /> 
 
     <InstallUISequence> 
diff --git a/util/installer/Installer64.wxs b/util/installer/Installer64.wxs
index 5a4eeb8b9..87c8ff9fa 100644
--- a/util/installer/Installer64.wxs
+++ b/util/installer/Installer64.wxs
@@ -13,6 +13,8 @@
 
     <Property Id="MajorMinorVersion">$(env.RENDERDOC_VERSION)</Property>
 
+    <Property Id="REINSTALLMODE" Value="amus"/> 
+
     <Upgrade Id="D320753C-4B18-4905-A752-E68959943E7D">
       <UpgradeVersion Minimum="0.18.0"
         IncludeMinimum="yes"