diff --git a/app/src/main/java/io/legado/app/constant/PreferKey.kt b/app/src/main/java/io/legado/app/constant/PreferKey.kt
index 446efc0bf..d4f54bb5d 100644
--- a/app/src/main/java/io/legado/app/constant/PreferKey.kt
+++ b/app/src/main/java/io/legado/app/constant/PreferKey.kt
@@ -13,4 +13,5 @@ object PreferKey {
     const val recordLog = "recordLog"
     const val processText = "process_text"
     const val cleanCache = "cleanCache"
+    const val lastGroup = "lastGroup"
 }
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