diff --git a/Facepunch.Steamworks/Structs/InventoryDef.cs b/Facepunch.Steamworks/Structs/InventoryDef.cs
index 4475986..0f689aa 100644
--- a/Facepunch.Steamworks/Structs/InventoryDef.cs
+++ b/Facepunch.Steamworks/Structs/InventoryDef.cs
@@ -102,7 +102,10 @@ namespace Steamworks
 
 			if ( !SteamInventory.Internal.GetItemDefinitionProperty( Id, name, out var vl, ref _ ) )
 				return null;
-
+				
+			if (name == null) //return keys string
+				return vl;
+				
 			if ( _properties == null )
 				_properties = new Dictionary<string, string>();
 
@@ -235,4 +238,4 @@ namespace Steamworks
 		}
 
 	}
-}
\ No newline at end of file
+}