diff --git a/rtl/amicommon/sysos.inc b/rtl/amicommon/sysos.inc
index b47f7b3552..9e988069b1 100644
--- a/rtl/amicommon/sysos.inc
+++ b/rtl/amicommon/sysos.inc
@@ -32,12 +32,14 @@
 {$include doslibf.inc}
 
 {$ifdef cpum68k}
-{$if defined(amiga_v1_0_only) or defined(amiga_v1_2_only)}
+{$if defined(amiga_v1_0_only) or defined(amiga_v1_2_only) or defined(amiga_v2_0_only)}
 {$include legacyexec.inc}
+{$if not defined(amiga_v2_0_only)}
 {$include legacydos.inc}
 {$include legacyutil.inc}
 {$endif}
 {$endif}
+{$endif}
 
 {*****************************************************************************
                              CPU specific