diff --git a/product/ERP5Subversion/Tool/SubversionTool.py b/product/ERP5Subversion/Tool/SubversionTool.py
index ac4d28db682e4652076aeb574e533b7abe287fe0..9d3ab4f2d8db3325de1b805c10efbd2c08a89488 100644
--- a/product/ERP5Subversion/Tool/SubversionTool.py
+++ b/product/ERP5Subversion/Tool/SubversionTool.py
@@ -733,6 +733,9 @@ class SubversionTool(BaseTool, UniqueObject, Folder):
     # First remove unversioned in working copy that could conflict
     self.removeAllInList(x['uid'] for x in self.unversionedFiles(path))
     client = self._getClient()
+    # Revert local changes in working copy first
+    # to import a "pure" BT after update
+    self.revert(path=path, recurse=True)
     # Update from SVN
     client.update(path)
     # Import in zodb