diff --git a/src/ifcpatch/ifcpatch/__init__.py b/src/ifcpatch/ifcpatch/__init__.py
index 1af72f9bf0..d8cf8fa5e4 100644
--- a/src/ifcpatch/ifcpatch/__init__.py
+++ b/src/ifcpatch/ifcpatch/__init__.py
@@ -17,7 +17,7 @@ def execute(args, is_library=None):
     patcher = recipe.Patcher(args["input"], ifc_file, logger, args["arguments"])
     print("# Patching ...")
     patcher.patch()
-    ifc_file = patcher.file
+    ifc_file = getattr(patcher, "file_patched", patcher.file)
     if is_library is True:
         return ifc_file
     print("# Writing patched file ...")
diff --git a/src/ifcpatch/ifcpatch/recipes/Migrate.py b/src/ifcpatch/ifcpatch/recipes/Migrate.py
index 610cb4934d..7d238e2204 100644
--- a/src/ifcpatch/ifcpatch/recipes/Migrate.py
+++ b/src/ifcpatch/ifcpatch/recipes/Migrate.py
@@ -10,9 +10,9 @@ class Patcher:
         self.args = args
 
     def patch(self):
-        self.new = ifcopenshell.file(schema=self.args[0])
+        self.file_patched = ifcopenshell.file(schema=self.args[0])
         migrator = ifcopenshell.util.schema.Migrator()
         for element in self.file:
+            migrator.migrate(element, self.file_patched)
             print("Migrating", element)
-            print("Successfully converted to", migrator.migrate(element, self.new))
-        self.file = self.new
+            print("Successfully converted to", migrator.migrate(element, self.file_patched))