diff --git a/CompatBot/CompatBot.csproj b/CompatBot/CompatBot.csproj
index fda4c318..e9b52ed5 100644
--- a/CompatBot/CompatBot.csproj
+++ b/CompatBot/CompatBot.csproj
@@ -35,8 +35,8 @@
     </Content>
   </ItemGroup>
   <ItemGroup>
-    <None Remove="..\win32_error_codes.txt" />
-    <AdditionalFiles Include="..\win32_error_codes.txt" />
+    <None Remove="..\win32_error_codes*.txt" />
+    <AdditionalFiles Include="..\win32_error_codes*.txt" />
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="DSharpPlus" Version="4.3.0-nightly-01189" />
diff --git a/SourceGenerators/Win32ErrorsSourceGenerator.cs b/SourceGenerators/Win32ErrorsSourceGenerator.cs
index 38c2fc41..87e4f9eb 100644
--- a/SourceGenerators/Win32ErrorsSourceGenerator.cs
+++ b/SourceGenerators/Win32ErrorsSourceGenerator.cs
@@ -29,13 +29,15 @@ public class Win32ErrorsSourceGenerator : ISourceGenerator
 
     public void Execute(GeneratorExecutionContext context)
     {
-        var resourceName = context.AdditionalFiles.FirstOrDefault(f => Path.GetFileName(f.Path).Equals("win32_error_codes.txt"));
+        var resourceName = context.AdditionalFiles
+            .OrderBy(f => f.Path, StringComparer.OrdinalIgnoreCase)
+            .LastOrDefault(f => Path.GetFileName(f.Path) is string fname && fname.StartsWith("win32_error_codes") && fname.EndsWith(".txt"));
         if (resourceName is null)
-            return;
+            throw new InvalidOperationException("Failed to locate win32_error_codes txt file");
             
         using var stream = File.Open(resourceName.Path, FileMode.Open, FileAccess.Read, FileShare.Read);
         if (stream is null)
-            throw new InvalidOperationException("Failed to get win32_error_codes.txt stream");
+            throw new InvalidOperationException("Failed to get win32_error_codes txt stream");
 
         if (!context.AnalyzerConfigOptions.GlobalOptions.TryGetValue("build_property.RootNamespace", out var ns))
             ns = context.Compilation.AssemblyName;
diff --git a/win32_error_codes.txt b/win32_error_codes_v19.0.txt
similarity index 100%
rename from win32_error_codes.txt
rename to win32_error_codes_v19.0.txt