diff --git a/src/apple2.mem.c b/src/apple2.mem.c
index 882cfa6..178dbb1 100644
--- a/src/apple2.mem.c
+++ b/src/apple2.mem.c
@@ -87,7 +87,7 @@ apple2_mem_map(apple2 *mach)
 {
     size_t addr;
 
-    for (addr = APPLE2_BANK_OFFSET; addr < 0x10000; addr++) {
+    for (addr = APPLE2_BANK_OFFSET; addr < MOS6502_MEMSIZE; addr++) {
         vm_segment_read_map(mach->memory, addr, apple2_mem_read_bank);
         vm_segment_write_map(mach->memory, addr, apple2_mem_write_bank);
     }