diff --git a/paddle/operators/bipartite_match_op.cc b/paddle/operators/bipartite_match_op.cc
index b0f7376d27..96f3a7ec0d 100644
--- a/paddle/operators/bipartite_match_op.cc
+++ b/paddle/operators/bipartite_match_op.cc
@@ -21,7 +21,7 @@ namespace operators {
 using Tensor = framework::Tensor;
 using LoDTensor = framework::LoDTensor;
 
-constexpr char kEPS = 1e-6;
+constexpr double kEPS = 1e-6;
 
 class BipartiteMatchOp : public framework::OperatorWithKernel {
  public: