diff --git a/vl.h b/vl.h
index b1be8c23e7..db367c13be 100644
--- a/vl.h
+++ b/vl.h
@@ -168,7 +168,7 @@ extern int nb_option_roms;
 #if defined (TARGET_PPC) || defined (TARGET_SPARC64)
 #define BIOS_SIZE ((512 + 32) * 1024)
 #elif defined(TARGET_MIPS)
-#define BIOS_SIZE (128 * 1024)
+#define BIOS_SIZE (4 * 1024 * 1024)
 #else
 #define BIOS_SIZE ((256 + 64) * 1024)
 #endif