diff --git a/tools/releasetools/apex_utils.py b/tools/releasetools/apex_utils.py
index 893266f..1ce08ea 100644
--- a/tools/releasetools/apex_utils.py
+++ b/tools/releasetools/apex_utils.py
@@ -370,7 +370,7 @@
 
   # Specify the 4K alignment when calling SignApk.
   extra_signapk_args = OPTIONS.extra_signapk_args[:]
-  extra_signapk_args.extend(['-a', '4096'])
+  extra_signapk_args.extend(['-a', '4096', '--align-file-size'])
 
   password = container_pw.get(container_key) if container_pw else None
   common.SignFile(