diff --git a/src/Polly.Core/Simmy/Fault/FaultGenerator.cs b/src/Polly.Core/Simmy/Fault/FaultGenerator.cs
index c5931c0..cfb943f 100644
--- a/src/Polly.Core/Simmy/Fault/FaultGenerator.cs
+++ b/src/Polly.Core/Simmy/Fault/FaultGenerator.cs
@@ -78,6 +78,6 @@ public sealed class FaultGenerator
 
         var generatorDelegate = generator._helper.CreateGenerator();
 
-        return args => new ValueTask<Exception?>(generatorDelegate(args.Context)!.Value.Exception);
+        return args => new ValueTask<Exception?>(generatorDelegate(args.Context)?.Exception);
     }
 }
diff --git a/test/Polly.Core.Tests/Simmy/Fault/FaultGeneratorTests.cs b/test/Polly.Core.Tests/Simmy/Fault/FaultGeneratorTests.cs
index 1b7e2cc..fd77255 100644
--- a/test/Polly.Core.Tests/Simmy/Fault/FaultGeneratorTests.cs
+++ b/test/Polly.Core.Tests/Simmy/Fault/FaultGeneratorTests.cs
@@ -39,6 +39,24 @@ public class FaultGeneratorTests
         Generate(generator).ShouldBeOfType<InvalidOperationException>();
     }
 
+    [Fact]
+    public void NoExceptionRegistered_ShouldReturnNull()
+    {
+        var generator = new FaultGenerator();
+
+        Generate(generator).ShouldBeNull();
+    }
+
+    [Fact]
+    public void AllWeightsZero_ShouldReturnNull()
+    {
+        var generator = new FaultGenerator();
+
+        generator.AddException<InvalidOperationException>(weight: 0);
+
+        Generate(generator).ShouldBeNull();
+    }
+
     private static Exception? Generate(FaultGenerator generator)
     {
         Func<FaultGeneratorArguments, ValueTask<Exception?>> func = generator;