diff --git a/paddle/utils/Flags.cpp b/paddle/utils/Flags.cpp
index 10db81cbda4f703ad6d0b6d4f6dbcd39d2736e56..ea47cf23eb6e56082eeb92f3c6dff8d03be0d679 100644
--- a/paddle/utils/Flags.cpp
+++ b/paddle/utils/Flags.cpp
@@ -28,9 +28,10 @@ DEFINE_bool(use_mkldnn, false, "Only support CPU training");
 #endif
 
 #ifdef PADDLE_WITH_MKLML
-DEFINE_bool(use_mkl_packed, true, "Default use MKL Packed Optimization");
-#else
+// TODO(TJ): change to true when fully confirmed
 DEFINE_bool(use_mkl_packed, false, "Whether to use MKL Packed Optimization");
+#else
+DEFINE_bool(use_mkl_packed, false, "Not to use MKL Packed Optimization");
 #endif
 
 DEFINE_bool(parallel_nn,