diff --git a/python/paddle/fluid/transpiler/memory_optimization_transpiler.py b/python/paddle/fluid/transpiler/memory_optimization_transpiler.py
index 7298bfe16ef7232ba072aaa3cf426914a1f5d8a2..b34575d0409061ad60f50a6534f1398666245714 100755
--- a/python/paddle/fluid/transpiler/memory_optimization_transpiler.py
+++ b/python/paddle/fluid/transpiler/memory_optimization_transpiler.py
@@ -321,8 +321,7 @@ class ControlFlowGraph(object):
 
                         if not compare_shape(x_shape, cache_shape, level):
                             continue
-                        # TODO(qijun): actually, we should compare
-                        # dtype_to_size[x_dtype] and dtype_to_size[cache_dtype]
+                        # TODO(qijun): dtype_to_size[x_dtype] and dtype_to_size[cache_dtype]
                         if x_dtype != cache_dtype:
                             continue