diff --git a/thunar/thunar-file.c b/thunar/thunar-file.c
index ebb1032..646b6c6 100644
--- a/thunar/thunar-file.c
+++ b/thunar/thunar-file.c
@@ -751,8 +751,8 @@ thunar_file_load (ThunarFile   *file,
       if (g_file_info_get_file_type (file->info) == G_FILE_TYPE_MOUNTABLE)
         {
           file->is_mounted = 
-            !g_file_info_get_attribute_boolean (file->info,
-                                                G_FILE_ATTRIBUTE_MOUNTABLE_CAN_MOUNT);
+            !!g_file_info_get_attribute_string (file->info,
+                                                G_FILE_ATTRIBUTE_STANDARD_TARGET_URI);
         }
     }
   else