diff --git a/src/klotski_core/ffi/benchmark.cc b/src/klotski_core/ffi/benchmark.cc
index cdcfa41..0e8acae 100644
--- a/src/klotski_core/ffi/benchmark.cc
+++ b/src/klotski_core/ffi/benchmark.cc
@@ -6,7 +6,7 @@ using klotski::Benchmark;
 ///////////////////////////////////////////////////////////////////////////////
 
 void benchmark_preparation() {
-    Benchmark::data_preparation();
+    Benchmark::data_initialize();
 }
 
 double benchmark_warm_up_us(uint64_t count) {
diff --git a/src/klotski_core/ffi/tmain.cc b/src/klotski_core/ffi/tmain.cc
index adae2a8..b2d3380 100644
--- a/src/klotski_core/ffi/tmain.cc
+++ b/src/klotski_core/ffi/tmain.cc
@@ -26,7 +26,7 @@ void tmain() {
     std::cout << "all cases: " <<
         Benchmark::all_cases() << "ms" << std::endl;
 
-    Benchmark::data_preparation();
+    Benchmark::data_initialize();
 
     std::cout << "raw code check: " <<
         Benchmark::raw_code_check() << "ns" << std::endl;