diff --git a/jsoncache/ApplicationCache.py b/jsoncache/ApplicationCache.py
index 0a46c96..902ae39 100644
--- a/jsoncache/ApplicationCache.py
+++ b/jsoncache/ApplicationCache.py
@@ -116,7 +116,7 @@ class ApplicationCache():
                     if cached_data is not None:
                         return unpacker(cached_data)
                 data = fun(*args, **kwargs)
-                if not cache_no_store:
+                if not cache_no_store and data is not None:
                     self.store(key=cache_key, data=packer(data))
                 return data
             return decorated