diff --git a/src/lmd/lib.py b/src/lmd/lib.py
index 7ed7aa8..c247619 100755
--- a/src/lmd/lib.py
+++ b/src/lmd/lib.py
@@ -256,6 +256,11 @@ def join(self,  collection: Collection):
         Returns:
             returns self
         """
+        if self.orientation_transform != collection.orientation_transform:
+            collection.orientation_transform = self.orientation_transform
+            
+            for shape in collection.shapes:
+                shape.orientation_transform = self.orientation_transform
         self.shapes += collection.shapes
 
         return self