diff --git a/python/paddle/fluid/inference_transpiler.py b/python/paddle/fluid/inference_transpiler.py
index 7b7bd899ea96f3d772ca7d1387c77c0ae1a2a483..be8a627953c1c8af4782900d2d9a90103f4799ec 100644
--- a/python/paddle/fluid/inference_transpiler.py
+++ b/python/paddle/fluid/inference_transpiler.py
@@ -81,6 +81,9 @@ class InferenceTranspiler:
             current_op = self.block.ops[i]
             # TODO(luotao1): consider only conv2d now. fc would be delt later.
             if current_op.type in ['conv2d']:
+                # TODO(luotao1): consider single chain network now. 
+                # For branch network, we counldn't use block.ops[i + 1] as 
+                # the judgment condition.
                 next_op = self.block.ops[i + 1]
                 # conv2d without bias
                 if (next_op.type == 'batch_norm'):