diff --git a/LibreMetaverse.Tests/InventoryManagerTests.cs b/LibreMetaverse.Tests/InventoryManagerTests.cs
index 3a793d3d..46252ab8 100644
--- a/LibreMetaverse.Tests/InventoryManagerTests.cs
+++ b/LibreMetaverse.Tests/InventoryManagerTests.cs
@@ -90,5 +90,31 @@ public void CreateInventoryItem_ReturnsCorrectSubclass()
                 Assert.That(unknown, Is.InstanceOf<InventoryItem>());
             }
         }
+
+        [TestCase(23, "Widget", "widget")]
+        [TestCase(24, "Person", "person")]
+        [TestCase(25, "Settings", "settings")]
+        [TestCase(26, "Material", "material")]
+        [TestCase(27, "GLTF", "gltf")]
+        [TestCase(28, "GLTFBin", "glbin")]
+        public void InventoryTypeCanonicalTail_HasExpectedWireValueAndName(int value, string enumName, string wireName)
+        {
+            var inventoryType = (InventoryType)value;
+
+            using (Assert.EnterMultipleScope())
+            {
+                Assert.That(Enum.GetName(typeof(InventoryType), inventoryType), Is.EqualTo(enumName));
+                Assert.That(Utils.InventoryTypeToString(inventoryType), Is.EqualTo(wireName));
+                Assert.That(Utils.StringToInventoryType(wireName), Is.EqualTo(inventoryType));
+            }
+        }
+
+        [Test]
+        public void CreateInventoryItem_MaterialWireValue_ReturnsMaterial()
+        {
+            var item = InventoryManager.CreateInventoryItem((InventoryType)26, UUID.Random());
+
+            Assert.That(item, Is.InstanceOf<InventoryMaterial>());
+        }
     }
 }
diff --git a/LibreMetaverse.Types/Enums.cs b/LibreMetaverse.Types/Enums.cs
index 478bfefb..59a0689c 100644
--- a/LibreMetaverse.Types/Enums.cs
+++ b/LibreMetaverse.Types/Enums.cs
@@ -297,10 +297,18 @@ public enum InventoryType : sbyte
         Gesture = 20,
         /// <summary></summary>
         Mesh = 22,
-        /// <summary></summary>
-        Settings = 23,
-        /// <summary></summary>
-        Material = 24,
+        /// <summary>Widget</summary>
+        Widget = 23,
+        /// <summary>Person</summary>
+        Person = 24,
+        /// <summary>Settings</summary>
+        Settings = 25,
+        /// <summary>Render material</summary>
+        Material = 26,
+        /// <summary>glTF asset</summary>
+        GLTF = 27,
+        /// <summary>Binary glTF asset</summary>
+        GLTFBin = 28,
     }
 
     /// <summary>
diff --git a/LibreMetaverse.Types/UtilsConversions.cs b/LibreMetaverse.Types/UtilsConversions.cs
index d1bd64cc..f2ce42e8 100644
--- a/LibreMetaverse.Types/UtilsConversions.cs
+++ b/LibreMetaverse.Types/UtilsConversions.cs
@@ -171,7 +171,13 @@ public static partial class Utils
 	        "animation",  // 19
 	        "gesture",    // 20
             string.Empty, // 21
-            "mesh"        // 22
+            "mesh",       // 22
+            "widget",     // 23
+            "person",     // 24
+            "settings",   // 25
+            "material",   // 26
+            "gltf",       // 27
+            "glbin"       // 28
         };
 
         private static readonly string[] _SaleTypeNames = {