diff --git a/camel_tools/disambig/mle.py b/camel_tools/disambig/mle.py
index 6dcf828..8ed6829 100644
--- a/camel_tools/disambig/mle.py
+++ b/camel_tools/disambig/mle.py
@@ -133,12 +133,13 @@ def __init__(self, analyzer, mle_path=None, top=1, cache_size=100000):
             top = 1
         self._top = top
 
-        if cache_size < 0:
+        if cache_size <= 0:
             cache_size = 0
-
-        self._cache = LFUCache(cache_size)
-        self._scored_analyses = cached(self._cache)(
-            self._scored_analyses)
+            self._cache = None
+            self._score_fn = self._scored_analyses
+        else:
+            self._cache = LFUCache(cache_size)
+            self._score_fn = self._scored_analyses_cached
 
     @staticmethod
     def pretrained(model_name=None, analyzer=None, top=1, cache_size=100000):
@@ -208,10 +209,13 @@ def _scored_analyses(self, word_dd):
                                                 w.analysis['diac']))
 
             return scored_analyses[0:self._top]
+        
+    def _scored_analyses_cached(self, word_dd):
+        return self._cache.get(word_dd, self._scored_analyses(word_dd))
 
     def _disambiguate_word(self, word):
         word_dd = dediac_ar(word)
-        scored_analyses = self._scored_analyses(word_dd)
+        scored_analyses = self._score_fn(word_dd)
 
         return DisambiguatedWord(word, scored_analyses)