diff --git a/cfg/cbm510.cfg b/cfg/cbm510.cfg
index 5f73174f3..b4e228fdd 100644
--- a/cfg/cbm510.cfg
+++ b/cfg/cbm510.cfg
@@ -20,11 +20,11 @@ SEGMENTS {
     PAGE2:    load = PAGE2,   type = rw;
     PAGE3:    load = PAGE3,   type = rw;
     LOWCODE:  load = MAIN,    type = ro,                optional = yes;
-    ONCE:     load = MAIN,    type = ro,  define = yes, optional = yes;
+    ONCE:     load = MAIN,    type = ro,                optional = yes;
     CODE:     load = MAIN,    type = ro;
     RODATA:   load = MAIN,    type = ro;
     DATA:     load = MAIN,    type = rw;
-    INIT:     load = MAIN,    type = bss;
+    INIT:     load = MAIN,    type = bss,               optional = yes;
     BSS:      load = MAIN,    type = bss, define = yes;
 }
 FEATURES {
diff --git a/cfg/cbm610.cfg b/cfg/cbm610.cfg
index fb4349dba..431734cd2 100644
--- a/cfg/cbm610.cfg
+++ b/cfg/cbm610.cfg
@@ -17,11 +17,11 @@ SEGMENTS {
     PAGE2:    load = PAGE2,   type = rw;
     PAGE3:    load = PAGE3,   type = rw;
     LOWCODE:  load = MAIN,    type = ro,                optional = yes;
-    ONCE:     load = MAIN,    type = ro,  define = yes, optional = yes;
+    ONCE:     load = MAIN,    type = ro,                optional = yes;
     CODE:     load = MAIN,    type = ro;
     RODATA:   load = MAIN,    type = ro;
     DATA:     load = MAIN,    type = rw;
-    INIT:     load = MAIN,    type = bss;
+    INIT:     load = MAIN,    type = bss,               optional = yes;
     BSS:      load = MAIN,    type = bss, define = yes;
 }
 FEATURES {