diff --git a/src/libsync/syncengine.cpp b/src/libsync/syncengine.cpp
index 29ddcf6fd9..c48b75a563 100644
--- a/src/libsync/syncengine.cpp
+++ b/src/libsync/syncengine.cpp
@@ -1044,7 +1044,8 @@ void SyncEngine::wipeVirtualFiles(const QString &localPath, SyncJournalDb &journ
 
     journal.forceRemoteDiscoveryNextSync();
 
-    // Postcondition: No ItemTypeVirtualFile / ItemTypeVirtualFileDownload left in the db
+    // Postcondition: No ItemTypeVirtualFile / ItemTypeVirtualFileDownload left in the db.
+    // But hydrated placeholders may still be around.
 }
 
 void SyncEngine::abort()
diff --git a/src/libsync/syncengine.h b/src/libsync/syncengine.h
index 9434ab5ace..add14d48e8 100644
--- a/src/libsync/syncengine.h
+++ b/src/libsync/syncengine.h
@@ -128,6 +128,9 @@ public:
      *
      * Particularly useful when switching off vfs mode or switching to a
      * different kind of vfs.
+     *
+     * Note that *hydrated* placeholder files might still be left. These will
+     * get cleaned up by Vfs::unregisterFolder().
      */
     static void wipeVirtualFiles(const QString &localPath, SyncJournalDb &journal, Vfs &vfs);