diff --git a/paddle/fluid/framework/operator.h b/paddle/fluid/framework/operator.h
index 7289a451e50573a97455f45ae8d5962d54c0e3df..5bd68f9ac2e1b30bc6ce3094960bb89842b99e01 100644
--- a/paddle/fluid/framework/operator.h
+++ b/paddle/fluid/framework/operator.h
@@ -174,14 +174,6 @@ class ExecutionContext {
     return op_.Inputs(name).size();
   }
 
-  const std::string InputVarName(const std::string& name) const {
-    return op_.Input(name);
-  }
-
-  const std::string OutputVarName(const std::string& name) const {
-    return op_.Output(name);
-  }
-
   size_t OutputSize(const std::string& name) const {
     return op_.Outputs(name).size();
   }
diff --git a/paddle/fluid/operators/cudnn_lstm_op.cu.cc b/paddle/fluid/operators/cudnn_lstm_op.cu.cc
index cadd3772afbbef6416d0c167257a3419d2f9362e..811975a9f3d0321aa01941e3c862ae1743269940 100644
--- a/paddle/fluid/operators/cudnn_lstm_op.cu.cc
+++ b/paddle/fluid/operators/cudnn_lstm_op.cu.cc
@@ -292,7 +292,7 @@ class CudnnLSTMGPUKernel : public framework::OpKernel<T> {
       // multi-devices before the first running.
       // use parent scope to make cache persistable
       auto *scope = const_cast<framework::Scope *>(ctx.scope().parent());
-      auto cache_var_name = ctx.InputVarName("Cache");
+      auto cache_var_name = ctx.Inputs("Cache")[0];
       cache_var = scope->Var(cache_var_name);
     }
     CudnnRNNCache *cudnn_rnn_cache = nullptr;