diff --git a/src/main.c b/src/main.c
index ad23f56..d0a0be0 100644
--- a/src/main.c
+++ b/src/main.c
@@ -190,6 +190,7 @@ int main(void) {
 
 	uart_putc('(');
 	load_rom((uint8_t*)"/sd2snes/menu.bin");
+	set_rom_mask(0x3fffff); // force mirroring off
 	uart_putc(')');
 
 	sram_writebyte(0, SRAM_CMD_ADDR);