diff --git a/paddle/fluid/operators/softmax_op.cc b/paddle/fluid/operators/softmax_op.cc
index 3592f20dbf9c9033af52e0065f48bc837ffe2101..578ab8eee3fb2981baf52ad2b48d9f621da819dc 100644
--- a/paddle/fluid/operators/softmax_op.cc
+++ b/paddle/fluid/operators/softmax_op.cc
@@ -16,6 +16,7 @@ limitations under the License. */
 
 #include <memory>
 #include <string>
+#include <unordered_map>
 
 #ifdef PADDLE_WITH_CUDA
 #include "paddle/fluid/platform/cudnn_helper.h"