diff --git a/CentrED/Tools/ElevateTool.cs b/CentrED/Tools/ElevateTool.cs
index 33eda58..054bc33 100644
--- a/CentrED/Tools/ElevateTool.cs
+++ b/CentrED/Tools/ElevateTool.cs
@@ -40,7 +40,7 @@ internal override void Draw()
     {
         ZMode.ADD => tile.Z + value,
         ZMode.SET => value,
-        ZMode.RANDOM => tile.Z + _random.Next(-value, value + 1),
+        ZMode.RANDOM => tile.Z + _random.Next(-Math.Abs(value), Math.Abs(value) + 1),
         _ => throw new ArgumentOutOfRangeException()
     });