diff --git a/paddle/fluid/framework/ir/graph_pattern_detector.cc b/paddle/fluid/framework/ir/graph_pattern_detector.cc
index 8625b562e7dfab5a65692863cdc22b62ce15d758..4664953c63ca0c4b86691995899e73eab2399740 100644
--- a/paddle/fluid/framework/ir/graph_pattern_detector.cc
+++ b/paddle/fluid/framework/ir/graph_pattern_detector.cc
@@ -259,6 +259,8 @@ GraphPatternDetector::DetectPatterns() {
   return result;
 }
 
+// TODO(Superjomn) enhance the function as it marks unique unique as duplicates
+// see https://github.com/PaddlePaddle/Paddle/issues/13550
 void GraphPatternDetector::UniquePatterns(
     std::vector<GraphPatternDetector::subgraph_t> *subgraphs) {
   if (subgraphs->empty()) return;