diff --git a/build/win32/code.iss b/build/win32/code.iss
index ea31a50c9bf..831b31a3c71 100644
--- a/build/win32/code.iss
+++ b/build/win32/code.iss
@@ -1034,7 +1034,7 @@ begin
       AltArch := '32';
     end;
 
-    if not Result then begin
+    if not Result and not WizardSilent() then begin
       MsgBox('Please uninstall the ' + AltArch + '-bit version of {#NameShort} before installing this ' + ThisArch + '-bit version.', mbInformation, MB_OK);
     end;
   end;