diff --git a/packages/metro-config/index.js b/packages/metro-config/index.js
index c43b46a34b8cf9..091b7006e14cd7 100644
--- a/packages/metro-config/index.js
+++ b/packages/metro-config/index.js
@@ -77,6 +77,9 @@ function getDefaultConfig(
     watchFolders: [],
   };
 
+  // Set global hook so that the CLI can detect when this config has been loaded
+  global.__REACT_NATIVE_METRO_CONFIG_LOADED = true;
+
   return mergeConfig(
     getBaseConfig.getDefaultValues(projectRoot),
     config,