diff --git a/WhiteMagicTest/StubAssemblerTests.cs b/WhiteMagicTest/StubAssemblerTests.cs
index 89acb4e..acfb6a4 100644
--- a/WhiteMagicTest/StubAssemblerTests.cs
+++ b/WhiteMagicTest/StubAssemblerTests.cs
@@ -187,7 +187,7 @@ public class StubAssemblerTests
     public void Far_target_throws()
     {
         Assert.Throws<ArgumentOutOfRangeException>(() =>
-            Create().BuildCallStub(IntPtr.Zero, (IntPtr)0xC0000000, [], 4, CallConvention.Cdecl));
+            Create().BuildCallStub(IntPtr.Zero, unchecked((IntPtr)(nint)0xC0000000), [], 4, CallConvention.Cdecl));
     }
 
     [Fact]