diff --git a/menu.py b/menu.py
index 950bdf2..9713962 100644
--- a/menu.py
+++ b/menu.py
@@ -37,6 +37,12 @@ class ChoosePartition:
         r = subprocess.check_output(['lsblk', '--all', '--json', '-O'])
         self.blkinfo = json.loads(r)
         partn = 0
+        # filter for devices with children, none other are used by this script
+        # (this is not entirely correct, but goes beyond these lines)
+        self.blkinfo['blockdevices'] = [
+            bd
+            for bd in self.blkinfo['blockdevices']
+                if 'children' in bd]
         for bd in self.blkinfo['blockdevices']:
             if 'children' not in bd:
                 continue