diff --git a/StatusBarFileSize.py b/StatusBarFileSize.py
index f642516..c7a8e1c 100644
--- a/StatusBarFileSize.py
+++ b/StatusBarFileSize.py
@@ -193,14 +193,14 @@ def update_file_size(self, view):
     call_cache = defaultdict(int)
 
     def _check_call(self, view):
-        self.call_cache[view] -= 1
-        if self.call_cache[view] == 0:
-            del self.call_cache[view]
+        self.call_cache[view.id()] -= 1 # use view.id()
+        if self.call_cache[view.id()] == 0: # use view.id()
+            del self.call_cache[view.id()] # use view.id()
             self.update_file_size(view)
 
     def update_file_size_debounced(self, view):
         delay = self.settings.get('typing_delay') or 200
-        self.call_cache[view] += 1
+        self.call_cache[view.id()] += 1 # use view.id()
         sublime.set_timeout_async(partial(self._check_call, view), delay)
 
     on_post_save_async = update_file_size_debounced