diff --git a/src/lib/netlist/plib/ppmf.h b/src/lib/netlist/plib/ppmf.h
index dc151d5d6a6..4f0e8b7ba07 100644
--- a/src/lib/netlist/plib/ppmf.h
+++ b/src/lib/netlist/plib/ppmf.h
@@ -241,23 +241,28 @@ namespace plib {
 	{
 	public:
 		class generic_class;
+
+		template <class C>
+		using MemberFunctionType =  R (C::*)(Targs...);
+
 		pmfp() : pmfp_base<R, Targs...>(), m_obj(nullptr) {}
 
-		template<typename MemberFunctionType, typename O>
-		pmfp(MemberFunctionType mftp, O *object)
+		template<typename O>
+		pmfp(MemberFunctionType<O> mftp, O *object)
 		: pmfp_base<R, Targs...>()
 		{
 			this->set(mftp, object);
 		}
 
-		template<typename MemberFunctionType, typename O>
-		void set(MemberFunctionType mftp, O *object)
+
+		template<typename O>
+		void set(MemberFunctionType<O> mftp, O *object)
 		{
 			this->set_base(mftp, object);
 			m_obj = reinterpret_cast<generic_class *>(object);
 		}
 
-		inline R operator()(Targs... args)
+		inline R operator()(Targs ... args)
 		{
 			return this->call(m_obj, std::forward<Targs>(args)...);
 		}
diff --git a/src/mame/audio/nl_kidniki.cpp b/src/mame/audio/nl_kidniki.cpp
index 7865ea40750..835ed884545 100644
--- a/src/mame/audio/nl_kidniki.cpp
+++ b/src/mame/audio/nl_kidniki.cpp
@@ -2,7 +2,7 @@
 // copyright-holders:Andrew Gardner, Couriersud
 #include "netlist/devices/net_lib.h"
 
-#define USE_FRONTIERS 1
+#define USE_FRONTIERS 0
 #define USE_FIXED_STV 1
 
 /* ----------------------------------------------------------------------------
@@ -326,8 +326,8 @@ NETLIST_START(kidniki)
 	PARAM(Solver.ACCURACY, 1e-7)
 	PARAM(Solver.NR_LOOPS, 100)
 	PARAM(Solver.GS_LOOPS, 300)
-	PARAM(Solver.METHOD, "MAT_CR")
-	//PARAM(Solver.METHOD, "GMRES")
+	//PARAM(Solver.METHOD, "MAT_CR")
+	PARAM(Solver.METHOD, "GMRES")
 	//PARAM(Solver.SOR_FACTOR, 1.73)
 	//PARAM(Solver.METHOD, "SOR")
 #endif