diff --git a/tools/releasetools/add_img_to_target_files.py b/tools/releasetools/add_img_to_target_files.py
index 7cb9072..ddc0d0b 100755
--- a/tools/releasetools/add_img_to_target_files.py
+++ b/tools/releasetools/add_img_to_target_files.py
@@ -78,6 +78,24 @@
   return CreateImage(input_dir, info_dict, "system", block_list=block_list)
 
 
+def AddSystemOther(output_zip, prefix="IMAGES/"):
+  """Turn the contents of SYSTEM_OTHER into a system_other image
+  and store it in output_zip."""
+
+  prebuilt_path = os.path.join(OPTIONS.input_tmp, prefix, "system_other.img")
+  if os.path.exists(prebuilt_path):
+    print "system_other.img already exists in %s, no need to rebuild..." % (prefix,)
+    return
+
+  imgname = BuildSystemOther(OPTIONS.input_tmp, OPTIONS.info_dict)
+  common.ZipWrite(output_zip, imgname, prefix + "system_other.img")
+
+def BuildSystemOther(input_dir, info_dict):
+  """Build the (sparse) system_other image and return the name of a temp
+  file containing it."""
+  return CreateImage(input_dir, info_dict, "system_other", block_list=None)
+
+
 def AddVendor(output_zip, prefix="IMAGES/"):
   """Turn the contents of VENDOR into a vendor image and store in it
   output_zip."""
@@ -268,6 +286,8 @@
   except KeyError:
     has_vendor = False
 
+  has_system_other = "SYSTEM_OTHER/" in input_zip.namelist()
+
   OPTIONS.info_dict = common.LoadInfoDict(input_zip, OPTIONS.input_tmp)
 
   common.ZipClose(input_zip)
@@ -314,6 +334,9 @@
   if has_vendor:
     banner("vendor")
     AddVendor(output_zip)
+  if has_system_other:
+    banner("system_other")
+    AddSystemOther(output_zip)
   banner("userdata")
   AddUserdata(output_zip)
   banner("cache")
diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
index 3d41e83..a9217ee 100755
--- a/tools/releasetools/build_image.py
+++ b/tools/releasetools/build_image.py
@@ -556,6 +556,19 @@
     copy_prop("system_squashfs_block_size", "squashfs_block_size")
     copy_prop("system_squashfs_disable_4k_align", "squashfs_disable_4k_align")
     copy_prop("system_base_fs_file", "base_fs_file")
+  elif mount_point == "system_other":
+    # We inherit the selinux policies of /system since we contain some of its files.
+    d["mount_point"] = "system"
+    copy_prop("fs_type", "fs_type")
+    copy_prop("system_fs_type", "fs_type")
+    copy_prop("system_size", "partition_size")
+    copy_prop("system_journal_size", "journal_size")
+    copy_prop("system_verity_block_device", "verity_block_device")
+    copy_prop("has_ext4_reserved_blocks", "has_ext4_reserved_blocks")
+    copy_prop("system_squashfs_compressor", "squashfs_compressor")
+    copy_prop("system_squashfs_compressor_opt", "squashfs_compressor_opt")
+    copy_prop("system_squashfs_block_size", "squashfs_block_size")
+    copy_prop("system_base_fs_file", "base_fs_file")
   elif mount_point == "data":
     # Copy the generic fs type first, override with specific one if available.
     copy_prop("fs_type", "fs_type")
@@ -618,6 +631,8 @@
     mount_point = ""
     if image_filename == "system.img":
       mount_point = "system"
+    elif image_filename == "system_other.img":
+      mount_point = "system_other"
     elif image_filename == "userdata.img":
       mount_point = "data"
     elif image_filename == "cache.img":