diff --git a/installer/psqlodbc_cpu.wxs b/installer/psqlodbc_cpu.wxs
index 0486a5f9..b49b92c1 100644
--- a/installer/psqlodbc_cpu.wxs
+++ b/installer/psqlodbc_cpu.wxs
@@ -140,9 +140,9 @@
     </Upgrade>
 
     <CustomAction Id='AlreadyUpdated'
-                Error="the same version of [$(var.PKGNAME)] is already installed" />
+                Error="the same version of [ProductName] is already installed" />
     <CustomAction Id='NoDowngrade'
-                Error="a new version of [$(var.PKGNAME)] is already installed" />
+                Error="a new version of [ProductName] is already installed" />
     <CustomAction Id='NoMinorUpgrade'
                 Error="REINSTALL unavailable. Major upgrade is needed." />
     <CustomAction Id='NoReinstall'