diff --git a/hw/xtensa/xtfpga.c b/hw/xtensa/xtfpga.c
index 2c2f9974a5..d441c024c2 100644
--- a/hw/xtensa/xtfpga.c
+++ b/hw/xtensa/xtfpga.c
@@ -408,7 +408,7 @@ static void xtensa_ml605_init(MachineState *machine)
 {
     static const LxBoardDesc ml605_board = {
         .flash_base = 0xf8000000,
-        .flash_size = 0x02000000,
+        .flash_size = 0x01000000,
         .flash_sector_size = 0x20000,
         .sram_size = 0x2000000,
     };