diff --git a/src/Scrutor/DecorationStrategy.cs b/src/Scrutor/DecorationStrategy.cs
index 877ad4b2..a87832c3 100644
--- a/src/Scrutor/DecorationStrategy.cs
+++ b/src/Scrutor/DecorationStrategy.cs
@@ -16,7 +16,8 @@ protected DecorationStrategy(Type serviceType, string? serviceKey)
     public string? ServiceKey { get; }
 
     public virtual bool CanDecorate(ServiceDescriptor descriptor) =>
-        string.Equals(ServiceKey, descriptor.ServiceKey as string, StringComparison.Ordinal) && CanDecorate(descriptor.ServiceType);
+        // object.Equals is used to support decorating services with object keys (e.g., KeyedService.AnyKey).
+        Equals(ServiceKey, descriptor.ServiceKey) && CanDecorate(descriptor.ServiceType);
 
     protected abstract bool CanDecorate(Type serviceType);
 
diff --git a/test/Scrutor.Tests/DecorationTests.cs b/test/Scrutor.Tests/DecorationTests.cs
index 0081257f..dbbeaf0c 100644
--- a/test/Scrutor.Tests/DecorationTests.cs
+++ b/test/Scrutor.Tests/DecorationTests.cs
@@ -84,6 +84,26 @@ public void ShouldAddServiceKeyToExistingServiceDescriptor()
         Assert.EndsWith("+Decorated", key);
     }
 
+    [Fact]
+    public void ShouldNotDecorateKeyedServiceWithNonKeyedDecorator()
+    {
+        var services = new ServiceCollection();
+
+        services.AddKeyedSingleton<IDecoratedService, OtherDecorated>(KeyedService.AnyKey);
+        services.AddSingleton<IDecoratedService, Decorated>();
+
+        services.Decorate<IDecoratedService, Decorator>();
+
+        var descriptors = services.GetDescriptors<IDecoratedService>();
+
+        Assert.Equal(3, descriptors.Length);
+
+        var nondecorated = descriptors.SingleOrDefault(x => x.IsKeyedService && x.KeyedImplementationType == typeof(OtherDecorated));
+
+        Assert.NotNull(nondecorated);
+        Assert.Equal(KeyedService.AnyKey, nondecorated.ServiceKey);
+    }
+
     [Fact]
     public void CanDecorateExistingInstance()
     {