diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupManager.kt b/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupManager.kt
index 9f9a60948..ecffce370 100755
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupManager.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupManager.kt
@@ -155,7 +155,7 @@ class BackupManager(val context: Context, version: Int = CURRENT_VERSION) {
 
         databaseHelper.inTransaction {
             // Get manga from database
-            val mangas = getFavoriteManga().filterNot { it.source == MERGED_SOURCE_ID } /* SY --> */ + getMergedManga() /* SY <-- */
+            val mangas = getFavoriteManga()/* SY --> */.filterNot { it.source == MERGED_SOURCE_ID } + getMergedManga().filterNot { it.source == MERGED_SOURCE_ID } /* SY <-- */
 
             val extensions: MutableSet<String> = mutableSetOf()