diff --git a/iphone/Maps/Classes/MapDownloader/MWMBaseMapDownloaderViewController.mm b/iphone/Maps/Classes/MapDownloader/MWMBaseMapDownloaderViewController.mm
index ece9e1cb4d..b1f9ab2b52 100644
--- a/iphone/Maps/Classes/MapDownloader/MWMBaseMapDownloaderViewController.mm
+++ b/iphone/Maps/Classes/MapDownloader/MWMBaseMapDownloaderViewController.mm
@@ -662,7 +662,7 @@ using namespace mwm;
 
 - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
 {
-  if (actionSheet.numberOfButtons == 0 || buttonIndex >= actionSheet.numberOfButtons)
+  if (actionSheet.numberOfButtons == 0 || buttonIndex >= actionSheet.numberOfButtons || buttonIndex < 0)
   {
     [actionSheet dismissWithClickedButtonIndex:0 animated:NO];
     return;