diff --git a/Source/Editor/GUI/Docking/DockPanel.cs b/Source/Editor/GUI/Docking/DockPanel.cs
index 3e00f3a65..5f229f25b 100644
--- a/Source/Editor/GUI/Docking/DockPanel.cs
+++ b/Source/Editor/GUI/Docking/DockPanel.cs
@@ -629,7 +629,7 @@ namespace FlaxEditor.GUI.Docking
 
         internal void MoveTabRight(int index)
         {
-            if (index < _tabs.Count - 2)
+            if (index < _tabs.Count - 1)
             {
                 var tab = _tabs[index];
                 _tabs.RemoveAt(index);