diff -Nrup atasm106.orig/src/asm.c atasm106/src/asm.c

--- atasm106.orig/src/asm.c	2009-03-17 21:39:26.000000000 +0100

+++ atasm106/src/asm.c	2009-03-22 15:14:31.000000000 +0100

@@ -2163,8 +2163,8 @@ int main(int argc, char *argv[]) {

       }

     else if (!strncasecmp(argv[i],"-d",2)) {

       str_list *str=(str_list *)malloc(sizeof(str_list));

-      str->str=(char *)malloc(strlen(argv[i]+1));

-      strcpy(str->str,argv[i]+1);

+      str->str=(char *)malloc(strlen(argv[i]+2));

+      strcpy(str->str,argv[i]+2);

       str->next=predefs;

       predefs=str;

     } else if (!strcasecmp(argv[i],"-s"))