diff --git a/src/lib/netlist/devices/nld_7448.cpp b/src/lib/netlist/devices/nld_7448.cpp
index 9cc4e0ab94c..baf26585884 100644
--- a/src/lib/netlist/devices/nld_7448.cpp
+++ b/src/lib/netlist/devices/nld_7448.cpp
@@ -9,7 +9,7 @@
 
 NETLIB_NAMESPACE_DEVICES_START()
 
-#if (0 && USE_TRUTHTABLE)
+#if (USE_TRUTHTABLE_7448 && USE_TRUTHTABLE)
 nld_7448::truthtable_t nld_7448::m_ttbl;
 const char *nld_7448::m_desc[] = {
 		" LTQ,BIQ,RBIQ, A , B , C , D | a, b, c, d, e, f, g",
@@ -45,13 +45,13 @@ NETLIB_START(7448_dip)
 {
 	NETLIB_NAME(7448)::start();
 
-	register_subalias("1", m_i[4]); // B
-	register_subalias("2", m_i[5]); // C
-	register_subalias("3", m_i[0]); // LTQ
-	register_subalias("4", m_i[1]); // BIQ
-	register_subalias("5", m_i[2]); // RBIQ
-	register_subalias("6", m_i[6]); // D
-	register_subalias("7", m_i[3]); // A
+	register_subalias("1", m_I[4]); // B
+	register_subalias("2", m_I[5]); // C
+	register_subalias("3", m_I[0]); // LTQ
+	register_subalias("4", m_I[1]); // BIQ
+	register_subalias("5", m_I[2]); // RBIQ
+	register_subalias("6", m_I[6]); // D
+	register_subalias("7", m_I[3]); // A
 
 	register_subalias("9",  m_Q[4]); // e
 	register_subalias("10", m_Q[3]); // d
diff --git a/src/lib/netlist/devices/nld_7448.h b/src/lib/netlist/devices/nld_7448.h
index deaf9389cb0..b5de0091fb5 100644
--- a/src/lib/netlist/devices/nld_7448.h
+++ b/src/lib/netlist/devices/nld_7448.h
@@ -25,6 +25,7 @@
 #define NLD_7448_H_
 
 #include "nl_base.h"
+#include "nld_truthtable.h"
 
 #define TTL_7448(_name, _A0, _A1, _A2, _A3, _LTQ, _BIQ, _RBIQ)                      \
 		NET_REGISTER_DEV(TTL_7448, _name)                                               \
@@ -39,16 +40,19 @@
 #define TTL_7448_DIP(_name)                                                         \
 		NET_REGISTER_DEV(TTL_7448_DIP, _name)
 
+NETLIB_NAMESPACE_DEVICES_START()
+
 /*
  * FIXME: Using truthtable is a lot slower than the explicit device
  */
-#if (0 && USE_TRUTHTABLE)
-#include "nld_truthtable.h"
+
+#define USE_TRUTHTABLE_7448	(0)
+
+#if (USE_TRUTHTABLE_7448 && USE_TRUTHTABLE)
 
 NETLIB_TRUTHTABLE(7448, 7, 7, 0);
-#else
 
-NETLIB_NAMESPACE_DEVICES_START()
+#else
 
 NETLIB_SUBDEVICE(7448_sub,
 	ATTR_HOT void update_outputs(UINT8 v);