diff --git a/Subsurface/Source/Map/LinkedSubmarine.cs b/Subsurface/Source/Map/LinkedSubmarine.cs
index 9488dc9d1..90286dfb0 100644
--- a/Subsurface/Source/Map/LinkedSubmarine.cs
+++ b/Subsurface/Source/Map/LinkedSubmarine.cs
@@ -225,8 +225,10 @@ namespace Barotrauma
             }
             else
             {
-                saveElement = new XElement("LinkedSubmarine");
+                if (!sub.DockedTo.Contains(Submarine.MainSub)) return null;
 
+                saveElement = new XElement("LinkedSubmarine");
+                
                 sub.SaveToXElement(saveElement);
             }