diff --git a/app/src/main/java/io/legado/app/help/storage/AppWebDav.kt b/app/src/main/java/io/legado/app/help/storage/AppWebDav.kt
index ca254b371..1fc779247 100644
--- a/app/src/main/java/io/legado/app/help/storage/AppWebDav.kt
+++ b/app/src/main/java/io/legado/app/help/storage/AppWebDav.kt
@@ -29,7 +29,7 @@ object AppWebDav {
 
     private val rootWebDavUrl: String
         get() {
-            var url = appCtx.getPrefString(PreferKey.webDavUrl)
+            var url = appCtx.getPrefString(PreferKey.webDavUrl)?.trim()
             if (url.isNullOrEmpty()) {
                 url = defaultWebDavUrl
             }