diff --git a/include/mcl/bn.hpp b/include/mcl/bn.hpp
index ab9e15c..68accfb 100644
--- a/include/mcl/bn.hpp
+++ b/include/mcl/bn.hpp
@@ -885,6 +885,10 @@ struct Param {
 		if (!*pb) return;
 		Fp::init(pb, cp.xi_a, p, mode);
 		if (!*pb) return;
+#ifdef MCL_DUMP_JIT
+		*pb = true;
+		return;
+#endif
 		Fp2::init();
 		const Fp2 xi(cp.xi_a, 1);
 		g2 = Fp2::get_gTbl()[0];
diff --git a/src/fp.cpp b/src/fp.cpp
index 1913559..d46eb6e 100644
--- a/src/fp.cpp
+++ b/src/fp.cpp
@@ -380,6 +380,9 @@ static bool initForMont(Op& op, const Unit *p, Mode mode)
 #ifdef MCL_USE_XBYAK
 	if (op.fg == 0) op.fg = Op::createFpGenerator();
 	bool useXbyak = op.fg->init(op, g_cpu);
+#ifdef MCL_DUMP_JIT
+	return true;
+#endif
 #ifdef MCL_USE_VINT
 	const int maxN = 6;
 #else