diff --git a/Makefile b/Makefile
index 364c17e..15a9049 100644
--- a/Makefile
+++ b/Makefile
@@ -294,8 +294,8 @@ $(EXE_DIR)/bn_c384_256_test.exe: $(OBJ_DIR)/bn_c384_256_test.o $(BN384_256_LIB)
 $(EXE_DIR)/bn_c512_test.exe: $(OBJ_DIR)/bn_c512_test.o $(BN512_LIB) $(MCL_LIB)
 	$(PRE)$(CXX) $< -o $@ $(BN512_LIB) $(MCL_LIB) $(LDFLAGS)
 
-$(EXE_DIR)/pairing_c.exe: $(OBJ_DIR)/pairing_c.o $(BN256_LIB) $(MCL_LIB)
-	$(PRE)$(CC) $< -o $@ $(BN256_LIB) $(MCL_LIB) $(LDFLAGS) -lstdc++
+$(EXE_DIR)/pairing_c.exe: $(OBJ_DIR)/pairing_c.o $(BN384_256_LIB) $(MCL_LIB)
+	$(PRE)$(CC) $< -o $@ $(BN384_256_LIB) $(MCL_LIB) $(LDFLAGS) -lstdc++
 
 $(EXE_DIR)/she_c256_test.exe: $(OBJ_DIR)/she_c256_test.o $(SHE256_LIB) $(MCL_LIB)
 	$(PRE)$(CXX) $< -o $@ $(SHE256_LIB) $(MCL_LIB) $(LDFLAGS)
diff --git a/sample/pairing_c.c b/sample/pairing_c.c
index ac55908..a669ec7 100644
--- a/sample/pairing_c.c
+++ b/sample/pairing_c.c
@@ -1,7 +1,6 @@
 #include <stdio.h>
 #include <string.h>
-#define MCLBN_FP_UNIT_SIZE 4
-#include <mcl/bn.h>
+#include <mcl/bn_c384_256.h>
 
 int g_err = 0;
 #define ASSERT(x) { if (!(x)) { printf("err %s:%d\n", __FILE__, __LINE__); g_err++; } }
@@ -11,7 +10,7 @@ int main()
 	char buf[1024];
 	const char *aStr = "123";
 	const char *bStr = "456";
-	int ret = mclBn_init(MCL_BN254, MCLBN_COMPILED_TIME_VAR);
+	int ret = mclBn_init(MCL_BLS12_381, MCLBN_COMPILED_TIME_VAR);
 	if (ret != 0) {
 		printf("err ret=%d\n", ret);
 		return 1;