diff --git a/lib/config.py b/lib/config.py
index b8adc8402caec5ab64c17d2d1b8c72101258b419..f44340b8d378c84cea68f361c3b33dbe34ca30b1 100644
--- a/lib/config.py
+++ b/lib/config.py
@@ -397,6 +397,7 @@ class ConfigWriter:
         # no minors used, we can start at 0
         result.append(0)
         ndata[0] = instance
+        self._temporary_drbds[(nname, 0)] = instance
         continue
       keys = ndata.keys()
       keys.sort()