diff --git a/tools/aapt2/cmd/Link.h b/tools/aapt2/cmd/Link.h
index dc18b1c..8fe414f 100644
--- a/tools/aapt2/cmd/Link.h
+++ b/tools/aapt2/cmd/Link.h
@@ -335,6 +335,11 @@
                         "are separated by ',' and the name is separated from the value by '='.\n"
                         "Example: \"flag1=true,flag2=false,flag3=\" (flag3 has no given value).",
                         &feature_flags_args_);
+    AddOptionalSwitch("--non-updatable-system",
+                      "Mark the app as a non-updatable system app. This inserts\n"
+                      "updatableSystem=\"false\" to the root manifest node, overwriting any\n"
+                      "existing attribute. This is ignored if the manifest has a versionCode.",
+                      &options_.manifest_fixer_options.non_updatable_system);
   }
 
   int Action(const std::vector<std::string>& args) override;