diff --git a/ulisp-arm.ino b/ulisp-arm.ino
index 97117d8..33255a6 100644
--- a/ulisp-arm.ino
+++ b/ulisp-arm.ino
@@ -125,7 +125,7 @@ typedef void (*pfun_t)(char);
   uint8_t _end;
 
 #elif defined(ARDUINO_SAM_DUE)
-  #define WORKSPACESIZE 3072-SDSIZE       /* Cells (8*bytes) */
+  #define WORKSPACESIZE 10240-SDSIZE      /* Cells (8*bytes) */
   #define SYMBOLTABLESIZE 512             /* Bytes */
   #define SDCARD_SS_PIN 10
   extern uint8_t _end;