diff --git a/src/ld65/cfg/cbm510.cfg b/src/ld65/cfg/cbm510.cfg
index 7a77930bf..3a0dbe1ed 100644
--- a/src/ld65/cfg/cbm510.cfg
+++ b/src/ld65/cfg/cbm510.cfg
@@ -1,5 +1,6 @@
 SYMBOLS {
-    __STACKSIZE__: value = $0781, weak = yes; # ~2k stack
+    # The stack starts from $FEC3 and grows towards the video ram
+    __STACKSIZE__: value = $06C3, weak = yes; # ~1.5k stack
 }
 MEMORY {
     HEADER:   file = %O,               start = $0001, size = $0050, fill = yes;
@@ -7,7 +8,7 @@ MEMORY {
     STARTUP:  file = %O,               start = $00FE, size = $0102, fill = yes;
     PAGE2:    file = %O,               start = $0200, size = $0100, fill = yes;
     PAGE3:    file = %O,               start = $0300, size = $0100, fill = yes;
-    RAM:      file = %O,               start = $0400, size = $DC00 - __STACKSIZE__;
+    RAM:      file = %O,               start = $0400, size = $DC00;
     CHARRAM:  file = "", define = yes, start = $E000, size = $1000;
     VIDRAM:   file = "", define = yes, start = $F000, size = $0400;
 }