diff --git a/Tsu.Trees.RedGreen/sample/Tsu.Trees.RedGreen.Sample.csproj b/Tsu.Trees.RedGreen/sample/Tsu.Trees.RedGreen.Sample.csproj
index d3c7634..5131d17 100644
--- a/Tsu.Trees.RedGreen/sample/Tsu.Trees.RedGreen.Sample.csproj
+++ b/Tsu.Trees.RedGreen/sample/Tsu.Trees.RedGreen.Sample.csproj
@@ -9,7 +9,7 @@
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
 
-    <WarningsAsErrors></WarningsAsErrors>
+    <WarningsAsErrors>CS8785</WarningsAsErrors>
     <NoWarn>CA17107;CS1591</NoWarn>
   </PropertyGroup>