diff --git a/NBTModel/Utility/NaturalComparer.cs b/NBTModel/Utility/NaturalComparer.cs
index e59f7f6..d3f7b35 100644
--- a/NBTModel/Utility/NaturalComparer.cs
+++ b/NBTModel/Utility/NaturalComparer.cs
@@ -29,11 +29,11 @@ namespace NBTExplorer.Utility
             }
             string[] x1, y1;
             if (!table.TryGetValue(x, out x1)) {
-                x1 = Regex.Split(x.Replace(" ", ""), "([0-9]+)");
+                x1 = Regex.Split(x.Replace(" ", ""), "(-?[0-9]+)");
                 table.Add(x, x1);
             }
             if (!table.TryGetValue(y, out y1)) {
-                y1 = Regex.Split(y.Replace(" ", ""), "([0-9]+)");
+                y1 = Regex.Split(y.Replace(" ", ""), "(-?[0-9]+)");
                 table.Add(y, y1);
             }