diff --git a/library/blivet.py b/library/blivet.py
index 18807de9..d82b86b5 100644
--- a/library/blivet.py
+++ b/library/blivet.py
@@ -630,7 +630,7 @@ def _look_up_device(self):
             device.original_format._key_file = self._volume.get('encryption_key')
             device.original_format.passphrase = self._volume.get('encryption_password')
             if device.isleaf:
-                self._blivet.populate()
+                self._blivet.devicetree.populate()
 
             if not device.isleaf:
                 device = device.children[0]