diff --git a/ChangeLog b/ChangeLog
index edb7d46f7..514ce4ef8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2011-01-24  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* util/grub-mkimage.c (generate_image): Refuse to create the images
+	bigger than the actual flash (512K) in Loongson machines. 512K is also
+	the biggest chip supported by them.
+
 2011-01-22  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/kern/emu/getroot.c: Include config-util.h explicitly.
diff --git a/util/grub-mkimage.c b/util/grub-mkimage.c
index 0375d3ed5..876e9c9b2 100644
--- a/util/grub-mkimage.c
+++ b/util/grub-mkimage.c
@@ -1196,7 +1196,9 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
 	grub_util_warn ("fwstart.img doesn't match the known good version. "
 			"Proceed at your own risk");
 
-      rom_size = ALIGN_UP (core_size + boot_size, 512 * 1024);
+      if (core_size + boot_size > 512 * 1024)
+	grub_util_error ("firmware image is too big");
+      rom_size = 512 * 1024;
 
       rom_img = xmalloc (rom_size);
       memset (rom_img, 0, rom_size);