diff --git a/paddle/fluid/framework/operator.cc b/paddle/fluid/framework/operator.cc
index f10da22aec1fc03b769e61ac1be750e7df69127d..afece8e3d28cdc3e9dce558a1dc2973241e0c3d5 100644
--- a/paddle/fluid/framework/operator.cc
+++ b/paddle/fluid/framework/operator.cc
@@ -29,6 +29,7 @@ DECLARE_bool(benchmark);
 DEFINE_bool(check_nan_inf, false,
             "Checking whether operator produce NAN/INF or not. It will be "
             "extremely slow so please use this flag wisely.");
+DEFINE_int32(inner_op_parallelism, 0, "number of threads for inner op");
 
 namespace paddle {
 namespace framework {
diff --git a/paddle/fluid/operators/hash_op.h b/paddle/fluid/operators/hash_op.h
index 9781bb0f453642cefb3eb59a05389c339a7de39d..1ed3ffe9aa2d68c73f0ca4b5427f0ba7a693524c 100644
--- a/paddle/fluid/operators/hash_op.h
+++ b/paddle/fluid/operators/hash_op.h
@@ -45,7 +45,7 @@ class HashKerel : public framework::OpKernel<T> {
     for (int idx = 0; idx < seq_length; ++idx) {
       for (int ihash = 0; ihash != num_hash; ++ihash) {
         output[idx * num_hash + ihash] =
-            XXH64(input, sizeof(int) * last_dim, ihash) % mod_by;
+            XXH32(input, sizeof(int) * last_dim, ihash) % mod_by;
       }
       input += last_dim;
     }