diff --git a/libsrc/supervision/crt0.s b/libsrc/supervision/crt0.s
index 6a3614476..bb82de3ee 100644
--- a/libsrc/supervision/crt0.s
+++ b/libsrc/supervision/crt0.s
@@ -9,6 +9,7 @@
         .import         initlib, donelib, copydata
         .import         zerobss
 	.import		__RAM_START__, __RAM_SIZE__	; Linker generated
+	.import		__STACKSIZE__			; Linker generated
 
 	.include "zeropage.inc"
 	.include "supervision.inc"
@@ -30,9 +31,9 @@ reset:
 	; initialize data
 	jsr	copydata
 
-	lda	#>(__RAM_START__ + __RAM_SIZE__)
+	lda	#>(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
        	sta	sp+1   		; Set argument stack ptr
-       	stz	sp              ; #<(__RAM_START__ + __RAM_SIZE__)
+       	stz	sp              ; #<(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
 	jsr	initlib
 	jsr	_main
 _exit:	jsr     donelib
diff --git a/src/ld65/cfg/supervision-128k.cfg b/src/ld65/cfg/supervision-128k.cfg
index 7f3ee51cc..0c2d1b36b 100644
--- a/src/ld65/cfg/supervision-128k.cfg
+++ b/src/ld65/cfg/supervision-128k.cfg
@@ -4,8 +4,11 @@
 # ld65 config file
 # ld65 --config supervision.cfg -o <prog>.bin <prog>.o
 
+SYMBOLS {
+    __STACKSIZE__: value = $0100, weak = yes; # 1 page stack
+}
 MEMORY {
-    RAM:      start = $0000, size = $2000;
+    RAM:      start = $0000, size = $2000 - __STACKSIZE__;
     VRAM:     start = $4000, size = $2000;
     BANKROM1: start = $8000, size = $4000, fill = yes, fillval = $FF, file = %O;
     BANKROM2: start = $8000, size = $4000, fill = yes, fillval = $FF, file = %O;
diff --git a/src/ld65/cfg/supervision-16k.cfg b/src/ld65/cfg/supervision-16k.cfg
index 5ec5db54e..791133e7b 100644
--- a/src/ld65/cfg/supervision-16k.cfg
+++ b/src/ld65/cfg/supervision-16k.cfg
@@ -2,14 +2,17 @@
 
 # ld65 config file
 # ld65 --config supervision16.cfg -o <prog>.bin <prog>.o
+
+SYMBOLS {
+    __STACKSIZE__: value = $0100, weak = yes; # 1 page stack
+}
 MEMORY {
     ZP:       start = $0000, size = $0100;
     CPUSTACK: start = $0100, size = $0100;
-    RAM:      start = $0200, size = $1E00;
+    RAM:      start = $0200, size = $1E00 - __STACKSIZE__;
     VRAM:     start = $4000, size = $2000;
     ROM:      start = $C000, size = $4000, fill = yes, fillval = $ff, file=%O, define=yes;
 }
-
 SEGMENTS {
     LOWCODE:  load = ROM,            type = ro,                optional = yes;
     INIT:     load = ROM,            type = ro,  define = yes, optional = yes;
diff --git a/src/ld65/cfg/supervision-64k.cfg b/src/ld65/cfg/supervision-64k.cfg
index 4cafdecae..6ae587296 100644
--- a/src/ld65/cfg/supervision-64k.cfg
+++ b/src/ld65/cfg/supervision-64k.cfg
@@ -4,8 +4,11 @@
 # ld65 config file
 # ld65 --config supervision.cfg -o <prog>.bin <prog>.o
 
+SYMBOLS {
+    __STACKSIZE__: value = $0100, weak = yes; # 1 page stack
+}
 MEMORY {
-    RAM:      start = $0000, size = $2000;
+    RAM:      start = $0000, size = $2000 - __STACKSIZE__;
     VRAM:     start = $4000, size = $2000;
     BANKROM1: start = $8000, size = $4000, fill = yes, fillval = $FF, file = %O;
     BANKROM2: start = $8000, size = $4000, fill = yes, fillval = $FF, file = %O;