diff --git a/src/emu/ioport.h b/src/emu/ioport.h
index 934bac1bbb2..8ab639e92ce 100644
--- a/src/emu/ioport.h
+++ b/src/emu/ioport.h
@@ -1581,6 +1581,7 @@ ATTR_COLD void INPUT_PORTS_NAME(_name)(device_t &owner, ioport_list &portlist, a
 #define DEVICE_INPUT_DEFAULTS_NAME(_name) device_iptdef_##_name
 
 #define device_iptdef_0 NULL
+#define device_iptdef_0L NULL
 #define device_iptdef_0LL NULL
 #define device_iptdef___null NULL