diff --git a/tools/releasetools/apex_utils.py b/tools/releasetools/apex_utils.py
index 40f7c92..d523701 100644
--- a/tools/releasetools/apex_utils.py
+++ b/tools/releasetools/apex_utils.py
@@ -626,7 +626,7 @@
     if os.path.isfile(deapexer_path):
       deapexer = deapexer_path
 
-  for apex_filename in os.listdir(target_dir):
+  for apex_filename in sorted(os.listdir(target_dir)):
     apex_filepath = os.path.join(target_dir, apex_filename)
     if not os.path.isfile(apex_filepath) or \
             not zipfile.is_zipfile(apex_filepath):