diff --git a/delta_performer.cc b/delta_performer.cc
index 471ce82..4d6df80 100644
--- a/delta_performer.cc
+++ b/delta_performer.cc
@@ -601,6 +601,11 @@
   }
   LOG(INFO) << "Verifying delta payload. Public key path: " << key_path;
 
+  // Verifies the download size.
+  TEST_AND_RETURN_VAL(kActionCodeDownloadSizeMismatchError,
+                      update_check_response_size ==
+                      manifest_metadata_size_ + buffer_offset_);
+
   // Verifies the download hash.
   const string& download_hash_data = hash_calculator_.hash();
   TEST_AND_RETURN_VAL(kActionCodeDownloadPayloadVerificationError,
@@ -608,11 +613,6 @@
   TEST_AND_RETURN_VAL(kActionCodeDownloadHashMismatchError,
                       download_hash_data == update_check_response_hash);
 
-  // Verifies the download size.
-  TEST_AND_RETURN_VAL(kActionCodeDownloadSizeMismatchError,
-                      update_check_response_size ==
-                      manifest_metadata_size_ + buffer_offset_);
-
   // Verifies the signed payload hash.
   if (!utils::FileExists(key_path.c_str())) {
     LOG(WARNING) << "Not verifying signed delta payload -- missing public key.";