diff --git a/dak/manage_debug_suites.py b/dak/manage_debug_suites.py
index c8a95a68aacb406d07b8458d62dbf93faa2bf353..5405f476fb551c1736d4da6a22189df6acea33b3 100644
--- a/dak/manage_debug_suites.py
+++ b/dak/manage_debug_suites.py
@@ -76,7 +76,7 @@ def clean(debug_suite, transaction):
      USING binaries b
      WHERE ba.suite = :debugsuite_id
        AND ba.bin = b.id
-       AND b.source IN (SELECT source FROM sources_removed)
+       AND b.source NOT IN (SELECT source FROM sources_to_keep)
     RETURNING
       b.package,
       b.version,