diff --git a/src/Umbraco.Web.Common/Security/ConfigureIISServerOptions.cs b/src/Umbraco.Web.Common/Security/ConfigureIISServerOptions.cs
index 22d958377c18..949a2b6419b0 100644
--- a/src/Umbraco.Web.Common/Security/ConfigureIISServerOptions.cs
+++ b/src/Umbraco.Web.Common/Security/ConfigureIISServerOptions.cs
@@ -12,7 +12,7 @@ public class ConfigureIISServerOptions : IConfigureOptions<IISServerOptions>
         public void Configure(IISServerOptions options)
         {
             // convert from KB to bytes
-            options.MaxRequestBodySize = _runtimeSettings.Value.MaxRequestLength * 1024;
+            options.MaxRequestBodySize = _runtimeSettings.Value.MaxRequestLength.HasValue ? _runtimeSettings.Value.MaxRequestLength.Value * 1024 : int.MaxValue;
         }
     }
 }