diff --git a/parser/tensorflow/tensorflow_parser_register.h b/parser/tensorflow/tensorflow_parser_register.h
index 17eaa23..12ca16c 100644
--- a/parser/tensorflow/tensorflow_parser_register.h
+++ b/parser/tensorflow/tensorflow_parser_register.h
@@ -39,7 +39,7 @@ class PARSER_FUNC_VISIBILITY TensorflowFinalizeable {
 
 class PARSER_FUNC_VISIBILITY TensorflowReceiver {
  public:
-  TensorflowReceiver(TensorflowFinalizeable &f) { f.Finalize(); }
+  explicit TensorflowReceiver(TensorflowFinalizeable &f) { f.Finalize(); }
   ~TensorflowReceiver() {}
 };