diff --git a/src/emu/netlist/analog/nld_twoterm.h b/src/emu/netlist/analog/nld_twoterm.h
index f72fa202689..9d0a1a0aed7 100644
--- a/src/emu/netlist/analog/nld_twoterm.h
+++ b/src/emu/netlist/analog/nld_twoterm.h
@@ -234,7 +234,7 @@ public:
 		{
 			nl_double a = (nVd - m_Vd) * m_VtInv;
 			if (a<1e-12 - 1.0) a = 1e-12 - 1.0;
-			m_Vd = m_Vd + log1p(a) * m_Vt;
+			m_Vd = m_Vd + nl_math::e_log1p(a) * m_Vt;
 
 			const nl_double eVDVt = nl_math::exp(m_Vd * m_VtInv);
 			m_Id = m_Is * (eVDVt - 1.0);
diff --git a/src/emu/netlist/nl_util.h b/src/emu/netlist/nl_util.h
index 6aea597977a..cab4f82dfec 100644
--- a/src/emu/netlist/nl_util.h
+++ b/src/emu/netlist/nl_util.h
@@ -54,8 +54,8 @@ public:
 	ATTR_HOT inline static double log(const double x) { return std::log(x); }
 	ATTR_HOT inline static float log(const float x) { return std::log(x); }
 #if defined(_MSC_VER) && _MSC_VER < 1800
-	ATTR_HOT inline static double log1p(const double x) { return nl_math::log(1.0 + x); }
-	ATTR_HOT inline static float log1p(const float x) { return nl_math::log(1.0 + x); }
+	ATTR_HOT inline static double e_log1p(const double x) { return nl_math::log(1.0 + x); }
+	ATTR_HOT inline static float e_log1p(const float x) { return nl_math::log(1.0 + x); }
 #else
 	ATTR_HOT inline static double e_log1p(const double x) { return log1p(x); }
 	ATTR_HOT inline static float e_log1p(const float x) { return log1pf(x); }