diff --git a/payload_generator/generate_delta_main.cc b/payload_generator/generate_delta_main.cc
index a187b32..8d18b48 100644
--- a/payload_generator/generate_delta_main.cc
+++ b/payload_generator/generate_delta_main.cc
@@ -421,6 +421,8 @@
               false,
               "The payload only targets a subset of partitions on the device,"
               "e.g. generic kernel image update.");
+  DEFINE_string(
+      apex_info_file, "", "Path to META/apex_info.pb found in target build");
 
   brillo::FlagHelper::Init(
       argc,
@@ -528,6 +530,15 @@
     return 1;
   }
 
+  if (!FLAGS_apex_info_file.empty()) {
+    // apex_info_file should point to a regular file(or symlink to a regular
+    // file)
+    CHECK(utils::FileExists(FLAGS_apex_info_file.c_str()));
+    CHECK(utils::IsRegFile(FLAGS_apex_info_file.c_str()) ||
+          utils::IsSymlink(FLAGS_apex_info_file.c_str()));
+    payload_config.apex_info_file = FLAGS_apex_info_file;
+  }
+
   if (!FLAGS_new_partitions.empty()) {
     LOG_IF(FATAL, !FLAGS_new_image.empty() || !FLAGS_new_kernel.empty())
         << "--new_image and --new_kernel are deprecated, please use "
diff --git a/payload_generator/payload_file.cc b/payload_generator/payload_file.cc
index 33c0749..6ec219f 100644
--- a/payload_generator/payload_file.cc
+++ b/payload_generator/payload_file.cc
@@ -25,6 +25,7 @@
 #include <base/strings/stringprintf.h>
 
 #include "update_engine/common/hash_calculator.h"
+#include "update_engine/common/utils.h"
 #include "update_engine/payload_consumer/delta_performer.h"
 #include "update_engine/payload_consumer/file_writer.h"
 #include "update_engine/payload_consumer/payload_constants.h"
@@ -74,6 +75,20 @@
   if (config.is_partial_update) {
     manifest_.set_partial_update(true);
   }
+
+  if (!config.apex_info_file.empty()) {
+    ApexMetadata apex_metadata;
+    int fd = open(config.apex_info_file.c_str(), O_RDONLY);
+    if (fd < 0) {
+      PLOG(FATAL) << "Failed to open " << config.apex_info_file << " for read.";
+    }
+    ScopedFdCloser closer{&fd};
+    CHECK(apex_metadata.ParseFromFileDescriptor(fd));
+    if (apex_metadata.apex_info_size() > 0) {
+      *manifest_.mutable_apex_info() =
+          std::move(*apex_metadata.mutable_apex_info());
+    }
+  }
   return true;
 }
 
diff --git a/payload_generator/payload_generation_config.h b/payload_generator/payload_generation_config.h
index 1d88101..9c8c59f 100644
--- a/payload_generator/payload_generation_config.h
+++ b/payload_generator/payload_generation_config.h
@@ -230,6 +230,9 @@
 
   // The maximum timestamp of the OS allowed to apply this payload.
   int64_t max_timestamp = 0;
+
+  // Path to apex_info.pb, extracted from target_file.zip
+  std::string apex_info_file;
 };
 
 }  // namespace chromeos_update_engine