diff --git a/src/routers/validateRouteConfigMap.js b/src/routers/validateRouteConfigMap.js
index fa4018a..9175606 100644
--- a/src/routers/validateRouteConfigMap.js
+++ b/src/routers/validateRouteConfigMap.js
@@ -41,7 +41,7 @@ function validateRouteConfigMap(routeConfigs: NavigationRouteConfigMap) {
       invariant(
         typeof routeConfig.screen === 'function',
         `The component for route '${routeName}' must be a ` +
-          'a React component. For example:\n\n' +
+          'React component. For example:\n\n' +
           "import MyScreen from './MyScreen';\n" +
           '...\n' +
           `${routeName}: {\n` +