diff --git a/sample/large.cpp b/sample/large.cpp
index cd79412..eb8d4e5 100644
--- a/sample/large.cpp
+++ b/sample/large.cpp
@@ -11,7 +11,7 @@ typedef mcl::FpT<> Fp;
 typedef mcl::fp::Unit Unit;
 using namespace mcl::fp;
 
-#include "../src/low_gmp.hpp"
+//#include "../src/low_gmp.hpp"
 const size_t N = 12;
 
 #if 0
@@ -110,8 +110,10 @@ void test(const std::string& pStr, mcl::fp::Mode mode)
 	CYBOZU_BENCH("sqrPre", op.fpDbl_sqrPre, ux, ux);
 	CYBOZU_BENCH("add", op.fpDbl_add, ux, ux, ux, op.p);
 	CYBOZU_BENCH("sub", op.fpDbl_sub, ux, ux, ux, op.p);
-	CYBOZU_BENCH("addNC", op.fpDbl_addNC, ux, ux, ux);
-	CYBOZU_BENCH("subNC", op.fpDbl_subNC, ux, ux, ux);
+	if (op.fpDbl_addNC) {
+		CYBOZU_BENCH("addNC", op.fpDbl_addNC, ux, ux, ux);
+		CYBOZU_BENCH("subNC", op.fpDbl_subNC, ux, ux, ux);
+	}
 	CYBOZU_BENCH("mont", op.fpDbl_mod, ux, ux, op.p);
 	CYBOZU_BENCH("mul", Fp::mul, x, x, x);
 	compareGmp(pStr);
diff --git a/sample/rawbench.cpp b/sample/rawbench.cpp
index ddfe733..e911019 100644
--- a/sample/rawbench.cpp
+++ b/sample/rawbench.cpp
@@ -38,8 +38,13 @@ void benchRaw(const char *p, mcl::fp::Mode mode)
 	double fp2_sqrT, fp2_mulT;
 	CYBOZU_BENCH_T(fp_addT, op.fp_add, uz, ux, uy, op.p);
 	CYBOZU_BENCH_T(fp_subT, op.fp_sub, uz, uy, ux, op.p);
-	CYBOZU_BENCH_T(fp_addNCT, op.fp_addNC, uz, ux, uy);
-	CYBOZU_BENCH_T(fp_subNCT, op.fp_subNC, uz, uy, ux);
+	if (op.fp_addNC) {
+		CYBOZU_BENCH_T(fp_addNCT, op.fp_addNC, uz, ux, uy);
+		CYBOZU_BENCH_T(fp_subNCT, op.fp_subNC, uz, uy, ux);
+	} else {
+		fp_addNCT = 0;
+		fp_subNCT = 0;
+	}
 	CYBOZU_BENCH_T(fp_sqrT, op.fp_sqr, uz, ux, op.p);
 	CYBOZU_BENCH_T(fp_mulT, op.fp_mul, uz, ux, uy, op.p);
 	CYBOZU_BENCH_T(fp_mul_UnitT, op.fp_mul_Unit, uz, ux, 12345678, op.p);