diff --git a/src/emu/cpu/m68000/m68kmame.c b/src/emu/cpu/m68000/m68kmame.c
index 6c17345e828..aa802da113e 100644
--- a/src/emu/cpu/m68000/m68kmame.c
+++ b/src/emu/cpu/m68000/m68kmame.c
@@ -928,7 +928,7 @@ void m68020_get_info(UINT32 state, cpuinfo *info)
 		case CPUINFO_INT_CLOCK_MULTIPLIER:				info->i = 1;							break;
 		case CPUINFO_INT_CLOCK_DIVIDER:					info->i = 1;							break;
 		case CPUINFO_INT_MIN_INSTRUCTION_BYTES:			info->i = 2;							break;
-		case CPUINFO_INT_MAX_INSTRUCTION_BYTES:			info->i = 16;							break;
+		case CPUINFO_INT_MAX_INSTRUCTION_BYTES:			info->i = 20;							break;
 		case CPUINFO_INT_MIN_CYCLES:					info->i = 4;							break;
 		case CPUINFO_INT_MAX_CYCLES:					info->i = 158;							break;
 
@@ -1170,7 +1170,7 @@ void m68040_get_info(UINT32 state, cpuinfo *info)
 		case CPUINFO_INT_CLOCK_MULTIPLIER:				info->i = 1;							break;
 		case CPUINFO_INT_CLOCK_DIVIDER:					info->i = 1;							break;
 		case CPUINFO_INT_MIN_INSTRUCTION_BYTES:			info->i = 2;							break;
-		case CPUINFO_INT_MAX_INSTRUCTION_BYTES:			info->i = 16;							break;
+		case CPUINFO_INT_MAX_INSTRUCTION_BYTES:			info->i = 20;							break;
 		case CPUINFO_INT_MIN_CYCLES:					info->i = 4;							break;
 		case CPUINFO_INT_MAX_CYCLES:					info->i = 158;							break;