diff --git a/common/image-android.c b/common/image-android.c
index ee03b96..c668407 100644
--- a/common/image-android.c
+++ b/common/image-android.c
@@ -161,6 +161,9 @@ int android_image_get_ramdisk(const struct andr_img_hdr *hdr,
 void android_print_contents(const struct andr_img_hdr *hdr)
 {
 	const char * const p = IMAGE_INDENT_STRING;
+	/* os_version = ver << 11 | lvl */
+	u32 os_ver = hdr->os_version >> 11;
+	u32 os_lvl = hdr->os_version & ((1U << 11) - 1);
 
 	printf("%skernel size:      %x\n", p, hdr->kernel_size);
 	printf("%skernel address:   %x\n", p, hdr->kernel_addr);
@@ -170,6 +173,12 @@ void android_print_contents(const struct andr_img_hdr *hdr)
 	printf("%ssecond address:   %x\n", p, hdr->second_addr);
 	printf("%stags address:     %x\n", p, hdr->tags_addr);
 	printf("%spage size:        %x\n", p, hdr->page_size);
+	/* ver = A << 14 | B << 7 | C         (7 bits for each of A, B, C)
+	 * lvl = ((Y - 2000) & 127) << 4 | M  (7 bits for Y, 4 bits for M) */
+	printf("%sos_version:       %x (ver: %u.%u.%u, level: %u.%u)\n",
+	       p, hdr->os_version,
+	       (os_ver >> 7) & 0x7F, (os_ver >> 14) & 0x7F, os_ver & 0x7F,
+	       (os_lvl >> 4) + 2000, os_lvl & 0x0F);
 	printf("%sname:             %s\n", p, hdr->name);
 	printf("%scmdline:          %s\n", p, hdr->cmdline);
 }
diff --git a/include/android_image.h b/include/android_image.h
index 094d60a..dfd4d9d 100644
--- a/include/android_image.h
+++ b/include/android_image.h
@@ -1,8 +1,8 @@
 /*
  * This is from the Android Project,
- * Repository: https://android.googlesource.com/platform/bootable/bootloader/legacy
- * File: include/boot/bootimg.h
- * Commit: 4205b865141ff2e255fe1d3bd16de18e217ef06a
+ * Repository: https://android.googlesource.com/platform/system/core/
+ * File: mkbootimg/bootimg.h
+ * Commit: d162828814b08ada310846a33205befb69ef5799
  *
  * Copyright (C) 2008 The Android Open Source Project
  *
@@ -12,10 +12,13 @@
 #ifndef _ANDROID_IMAGE_H_
 #define _ANDROID_IMAGE_H_
 
+typedef struct andr_img_hdr andr_img_hdr;
+
 #define ANDR_BOOT_MAGIC "ANDROID!"
 #define ANDR_BOOT_MAGIC_SIZE 8
 #define ANDR_BOOT_NAME_SIZE 16
 #define ANDR_BOOT_ARGS_SIZE 512
+#define ANDR_BOOT_EXTRA_ARGS_SIZE 1024
 
 struct andr_img_hdr {
 	char magic[ANDR_BOOT_MAGIC_SIZE];
@@ -31,14 +34,25 @@ struct andr_img_hdr {
 
 	u32 tags_addr;		/* physical addr for kernel tags */
 	u32 page_size;		/* flash page size we assume */
-	u32 unused[2];		/* future expansion: should be 0 */
+	u32 unused;		/* reserved for future expansion: MUST be 0 */
+
+	/* operating system version and security patch level; for
+	 * version "A.B.C" and patch level "Y-M-D":
+	 * ver = A << 14 | B << 7 | C         (7 bits for each of A, B, C)
+	 * lvl = ((Y - 2000) & 127) << 4 | M  (7 bits for Y, 4 bits for M)
+	 * os_version = ver << 11 | lvl */
+	u32 os_version;
 
 	char name[ANDR_BOOT_NAME_SIZE]; /* asciiz product name */
 
 	char cmdline[ANDR_BOOT_ARGS_SIZE];
 
 	u32 id[8]; /* timestamp / checksum / sha1 / etc */
-};
+
+	/* Supplemental command line data; kept here to maintain
+	 * binary compatibility with older versions of mkbootimg */
+	char extra_cmdline[ANDR_BOOT_EXTRA_ARGS_SIZE];
+} __attribute__((packed));
 
 /*
  * +-----------------+