diff --git a/src/Destructurama.Attributed.Tests/MaskedAttributeTests.cs b/src/Destructurama.Attributed.Tests/MaskedAttributeTests.cs
index fc53f6f..c761315 100644
--- a/src/Destructurama.Attributed.Tests/MaskedAttributeTests.cs
+++ b/src/Destructurama.Attributed.Tests/MaskedAttributeTests.cs
@@ -76,11 +76,17 @@ public class CustomizedMaskedLogs
     public string? ShowLastThreeThenDefaultMaskedPreservedLength { get; set; }
 
     /// <summary>
-    ///  123456789 results in "123REMOVED"
+    /// 123456789 results in "123_REMOVED_"
     /// </summary>
     [LogMasked(Text = "_REMOVED_", ShowFirst = 3)]
     public string? ShowFirstThreeThenCustomMask { get; set; }
 
+    /// <summary>
+    /// d3c4a1f2-3b4e-4f5a-9b6c-7d8e9f0a1b2c results in "d3c4a_REMOVED_"
+    /// </summary>
+    [LogMasked(Text = "_REMOVED_", ShowFirst = 5)]
+    public Guid? ShowFirstThreeThenCustomMaskGuid { get; set; }
+
     /// <summary>
     ///  123456789 results in "123_REMOVED_"
     /// </summary>
@@ -289,6 +295,25 @@ public void LogMaskedAttribute_Shows_First_NChars_Then_Replaces_All_With_Custom_
         props["ShowFirstThreeThenCustomMask"].LiteralValue().ShouldBe("123_REMOVED_");
     }
 
+    [Test]
+    public void LogMaskedAttribute_Shows_First_NChars_Then_Replaces_All_With_Custom_Mask_value_is_Guid()
+    {
+        // [LogMasked(Text = "_REMOVED_", ShowFirst = 5)]
+        // -> "d3c4a_REMOVED_"
+        var customized = new CustomizedMaskedLogs
+        {
+            ShowFirstThreeThenCustomMaskGuid = Guid.Parse("d3c4a1f2-3b4e-4f5a-9b6c-7d8e9f0a1b2c")
+        };
+
+        var evt = DelegatingSink.Execute(customized);
+
+        var sv = (StructureValue)evt.Properties["Customized"];
+        var props = sv.Properties.ToDictionary(p => p.Name, p => p.Value);
+
+        props.ContainsKey("ShowFirstThreeThenCustomMaskGuid").ShouldBeTrue();
+        props["ShowFirstThreeThenCustomMaskGuid"].LiteralValue().ShouldBe("d3c4a_REMOVED_");
+    }
+
     [Test]
     public void LogMaskedAttribute_Shows_First_NChars_Then_Replaces_All_With_Custom_Mask_PreservedLength_Ignored()
     {
diff --git a/src/Destructurama.Attributed/Attributed/LogMaskedAttribute.cs b/src/Destructurama.Attributed/Attributed/LogMaskedAttribute.cs
index 4f61694..131e596 100644
--- a/src/Destructurama.Attributed/Attributed/LogMaskedAttribute.cs
+++ b/src/Destructurama.Attributed/Attributed/LogMaskedAttribute.cs
@@ -119,6 +119,7 @@ private LogEventPropertyValue CreateValue(object? value)
         {
             IEnumerable<string> strings => new SequenceValue(strings.Select(s => new ScalarValue(FormatMaskedValue(s)))),
             string s => new ScalarValue(FormatMaskedValue(s)),
+            Guid g => new ScalarValue(FormatMaskedValue(g.ToString())),
             _ => ScalarValue.Null
         };
     }