diff --git a/src/machine/machine_table.c b/src/machine/machine_table.c
index 66b05efd0..d7dce0dd2 100644
--- a/src/machine/machine_table.c
+++ b/src/machine/machine_table.c
@@ -3219,7 +3219,7 @@ const machine_t machines[] = {
         .name = "[ISA] Olivetti M290/AT&T 6286 WGS", 
         .internal_name = "m290", 
         .type = MACHINE_TYPE_286, 
-        .chipset = MACHINE_CHIPSET_PROPRIETARY, /* Machine has chipset: VLSI TOPCAT */
+        .chipset = MACHINE_CHIPSET_PROPRIETARY, /* Yes, it's M290 with 98/86 gate array, not M290-30 with VLSI TOPCAT chipset. */
         .init = machine_at_m290_init, 
         .p1_handler = NULL, 
         .gpio_handler = NULL,