diff --git a/spellpy/spell.py b/spellpy/spell.py
index a335d24..450ca20 100644
--- a/spellpy/spell.py
+++ b/spellpy/spell.py
@@ -126,7 +126,7 @@ def LCSMatch(self, LCSMap, seq):
         size_seq = len(seq)
         for LCSObject in LCSMap:
             set_template = set(LCSObject.logTemplate)
-            if len(set_seq & set_template) < 0.5 * size_seq:
+            if len(set_seq & set_template) < 0.5 * len(set_seq):
                 continue
             lcs = self.LCS(seq, LCSObject.logTemplate)
             if len(lcs) > maxLen or (len(lcs) == maxLen and len(LCSObject.logTemplate) < len(maxLCSObject.logTemplate)):
diff --git a/tests/test_spellpy.py b/tests/test_spellpy.py
index fa428ed..93e6282 100644
--- a/tests/test_spellpy.py
+++ b/tests/test_spellpy.py
@@ -94,6 +94,15 @@ def test_getTemplate(self):
         new_template = self.parser.getTemplate(lcs, seq)
         self.assertListEqual(new_template, expected_template)
 
+    def test_LCSMatch_duplicate_tokens(self):
+        seq = ['a'] * 76
+        logmessageL = ['a'] * 76
+        newCluster = LCSObject(logTemplate=logmessageL, logIDL=[0])
+
+        ret = self.parser.LCSMatch([newCluster], seq)
+        self.assertIsNotNone(ret)
+        self.assertListEqual(ret.logTemplate, newCluster.logTemplate)
+
 
 def helper(rootNode):
     if rootNode.childD == dict():