diff --git a/iOS/TUIKit/TUIChat/UI_Classic/Chat/TUIBaseChatViewController.m b/iOS/TUIKit/TUIChat/UI_Classic/Chat/TUIBaseChatViewController.m
index 23d4a64515..815d0b6502 100644
--- a/iOS/TUIKit/TUIChat/UI_Classic/Chat/TUIBaseChatViewController.m
+++ b/iOS/TUIKit/TUIChat/UI_Classic/Chat/TUIBaseChatViewController.m
@@ -171,7 +171,7 @@ - (void)setupNavigator {
     }
     _titleView = [[TUINaviBarIndicatorView alloc] init];
     self.navigationItem.titleView = _titleView;
-    self.navigationItem.title = @"";
+    self.navigationItem.title = @"    ";
     __weak typeof (self)weakSelf = self;
     [[RACObserve(_conversationData, title) distinctUntilChanged] subscribeNext:^(NSString *title) {
         [weakSelf.titleView setTitle:title];