diff --git a/tools/releasetools/ota_from_target_files b/tools/releasetools/ota_from_target_files
index 69af4bc..13eb6cf 100755
--- a/tools/releasetools/ota_from_target_files
+++ b/tools/releasetools/ota_from_target_files
@@ -887,7 +887,8 @@
                                               "no_prereq",
                                               "extra_script=",
                                               "worker_threads=",
-                                              "aslr_mode="],
+                                              "aslr_mode=",
+                                              ],
                              extra_option_handler=option_handler)
 
   if len(args) != 2: