diff --git a/revel/skeleton/app/init.go b/revel/skeleton/app/init.go
index 08e3b80..926efba 100644
--- a/revel/skeleton/app/init.go
+++ b/revel/skeleton/app/init.go
@@ -28,7 +28,9 @@ func init() {
 	}
 
 	// register startup functions with OnAppStart
+	// revel.DevMode and revel.RunMode only work inside of OnAppStart. See Example Startup Script
 	// ( order dependent )
+	// revel.OnAppStart(ExampleStartupScript)
 	// revel.OnAppStart(InitDB)
 	// revel.OnAppStart(FillCache)
 }
@@ -44,3 +46,11 @@ var HeaderFilter = func(c *revel.Controller, fc []revel.Filter) {
 
 	fc[0](c, fc[1:]) // Execute the next filter stage.
 }
+
+func ExampleStartupScript() {
+	// revel.DevMod and revel.RunMode work here
+	// Use this script to check for dev mode and set dev/prod startup scripts here!
+	if revel.DevMode == true {
+		os.Setenv("SOME_ENV_VAR", "VALUE")
+	}
+}