diff --git a/asminc/cpu.mac b/asminc/cpu.mac
index a67407a4a..6b9cb9947 100644
--- a/asminc/cpu.mac
+++ b/asminc/cpu.mac
@@ -7,7 +7,7 @@ CPU_ISET_65C02     = $0010
 CPU_ISET_65816     = $0020
 CPU_ISET_SWEET16   = $0040
 CPU_ISET_HUC6280   = $0080
-;CPU_ISET_M740     = $0100
+;CPU_ISET_M740     = $0100 not actually implemented
 CPU_ISET_4510      = $0200
 
 ; CPU capabilities