diff --git a/src/Microsoft.Windows.CsWin32/Generator.cs b/src/Microsoft.Windows.CsWin32/Generator.cs
index 59ca7d13..d30c47c9 100644
--- a/src/Microsoft.Windows.CsWin32/Generator.cs
+++ b/src/Microsoft.Windows.CsWin32/Generator.cs
@@ -53,6 +53,7 @@ public class Generator : IDisposable
         { "OVERLAPPED", ParseTypeName("global::System.Threading.NativeOverlapped") },
         { "POINT", ParseTypeName("global::System.Drawing.Point") },
         { "POINTF", ParseTypeName("global::System.Drawing.PointF") },
+        { "STREAM_SEEK", ParseTypeName("global::System.IO.SeekOrigin") },
     };
 
     /// <summary>
diff --git a/test/Microsoft.Windows.CsWin32.Tests/GeneratorTests.cs b/test/Microsoft.Windows.CsWin32.Tests/GeneratorTests.cs
index 3ba0c468..508d5e35 100644
--- a/test/Microsoft.Windows.CsWin32.Tests/GeneratorTests.cs
+++ b/test/Microsoft.Windows.CsWin32.Tests/GeneratorTests.cs
@@ -3058,6 +3058,19 @@ public void ParametersIncludeSizeParamIndex()
         Assert.Equal("0", ((LiteralExpressionSyntax)sizeParamIndex!.Expression).Token.ValueText);
     }
 
+    [Fact]
+    public void SeekOriginEnumPreferred()
+    {
+        this.generator = this.CreateGenerator();
+        Assert.True(this.generator.TryGenerateType("IStream"));
+        this.CollectGeneratedCode(this.generator);
+        this.AssertNoDiagnostics();
+
+        MethodDeclarationSyntax seekMethod = Assert.Single(this.FindGeneratedMethod("Seek"));
+        QualifiedNameSyntax seekParamType = Assert.IsType<QualifiedNameSyntax>(seekMethod.ParameterList.Parameters[1].Type);
+        Assert.Equal(nameof(SeekOrigin), seekParamType.Right.Identifier.ValueText);
+    }
+
     private static string ConstructGlobalConfigString(bool omitDocs = false)
     {
         StringBuilder globalConfigBuilder = new();