diff --git a/src/lib/netlist/devices/nld_4020.cpp b/src/lib/netlist/devices/nld_4020.cpp
index 9e2dd386654..7061de4bd31 100644
--- a/src/lib/netlist/devices/nld_4020.cpp
+++ b/src/lib/netlist/devices/nld_4020.cpp
@@ -79,7 +79,7 @@ namespace netlist
 				m_cnt = 0;
 				m_IP.inactivate();
 				/* static */ const netlist_time reset_time = netlist_time::from_nsec(140);
-				for (int i = 0; i < _TotalBits; i++)
+				for (unsigned i = 0; i < _TotalBits; i++)
 					if (((_LiveBitmask >> i) & 1) != 0)
 						m_Q[i].push(0, reset_time);
 			}
@@ -100,7 +100,7 @@ namespace netlist
 					NLTIME_FROM_NS(1380), NLTIME_FROM_NS(1480),
 			};
 
-			for (int i = 0; i < _TotalBits; i++)
+			for (unsigned i = 0; i < _TotalBits; i++)
 				if (((_LiveBitmask >> i) & 1) != 0)
 					m_Q[i].push((cnt >> i) & 1, out_delayQn[i]);
 		}
diff --git a/src/lib/netlist/devices/nld_roms.cpp b/src/lib/netlist/devices/nld_roms.cpp
index d39324e226f..1903b2d3adc 100644
--- a/src/lib/netlist/devices/nld_roms.cpp
+++ b/src/lib/netlist/devices/nld_roms.cpp
@@ -67,7 +67,7 @@ namespace netlist
 			{
 				if (!m_ARQ())
 				{
-					uint16_t addr = m_A();
+					const auto addr = m_A();
 					m_latched_rom = m_ROM[addr];
 				}
 				uint8_t o = (m_enable_hi || m_enable_lo) ? m_latched_rom : 0;