--- a/tools/mkimage.c
+++ b/tools/mkimage.c
@@ -24,6 +24,7 @@ struct image_tool_params params = {
 	.arch = IH_ARCH_PPC,
 	.type = IH_TYPE_KERNEL,
 	.comp = IH_COMP_GZIP,
+	.magic = IH_MAGIC,
 	.dtc = MKIMAGE_DEFAULT_DTC_OPTIONS,
 	.imagename = "",
 	.imagename2 = "",
@@ -168,6 +169,16 @@ main (int argc, char **argv)
 					genimg_get_comp_id (*++argv)) < 0)
 					usage ();
 				goto NXTARG;
+			case 'M':
+				if (--argc <=0)
+					usage ();
+				params.magic = strtoul (*++argv, &ptr, 16);
+				if (*ptr) {
+					fprintf (stderr,
+						"%s: invalid magic %s\n",
+						params.cmdname, *argv);
+				}
+				goto NXTARG;
 			case 'D':
 				if (--argc <= 0)
 					usage ();
@@ -623,12 +634,13 @@ static void usage(void)
 	fprintf (stderr, "Usage: %s -l image\n"
 			 "          -l ==> list image header information\n",
 		params.cmdname);
-	fprintf (stderr, "       %s [-x] -A arch -O os -T type -C comp "
+	fprintf (stderr, "       %s [-x] -A arch -O os -T type -C comp -M magic "
 			 "-a addr -e ep -n name -d data_file[:data_file...] image\n"
 			 "          -A ==> set architecture to 'arch'\n"
 			 "          -O ==> set operating system to 'os'\n"
 			 "          -T ==> set image type to 'type'\n"
 			 "          -C ==> set compression type 'comp'\n"
+			 "          -M ==> set image magic to 'magic'\n"
 			 "          -a ==> set load address to 'addr' (hex)\n"
 			 "          -e ==> set entry point to 'ep' (hex)\n"
 			 "          -n ==> set image name to 'name'\n"
--- a/tools/default_image.c
+++ b/tools/default_image.c
@@ -98,7 +98,7 @@ static void image_set_header(void *ptr,
 			sbuf->st_size - sizeof(image_header_t));
 
 	/* Build new header */
-	image_set_magic(hdr, IH_MAGIC);
+	image_set_magic(hdr, params->magic);
 	image_set_time(hdr, sbuf->st_mtime);
 	image_set_size(hdr, sbuf->st_size - sizeof(image_header_t));
 	image_set_load(hdr, params->addr);
--- a/tools/imagetool.h
+++ b/tools/imagetool.h
@@ -44,6 +44,7 @@ struct image_tool_params {
 	int arch;
 	int type;
 	int comp;
+	unsigned int magic;
 	char *dtc;
 	unsigned int addr;
 	unsigned int ep;