diff --git a/goji.go b/goji.go
index f6d9335..ab278cd 100644
--- a/goji.go
+++ b/goji.go
@@ -34,44 +34,3 @@ methods of using this library are equally well supported.
 Goji requires Go 1.2 or newer.
 */
 package goji
-
-import (
-	"flag"
-	"log"
-	"net/http"
-
-	"github.com/zenazn/goji/bind"
-	"github.com/zenazn/goji/graceful"
-)
-
-func init() {
-	bind.WithFlag()
-	if fl := log.Flags(); fl&log.Ltime != 0 {
-		log.SetFlags(fl | log.Lmicroseconds)
-	}
-}
-
-// Serve starts Goji using reasonable defaults.
-func Serve() {
-	if !flag.Parsed() {
-		flag.Parse()
-	}
-
-	// Install our handler at the root of the standard net/http default mux.
-	// This allows packages like expvar to continue working as expected.
-	http.Handle("/", DefaultMux)
-
-	listener := bind.Default()
-	log.Println("Starting Goji on", listener.Addr())
-
-	graceful.HandleSignals()
-	bind.Ready()
-
-	err := graceful.Serve(listener, http.DefaultServeMux)
-
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	graceful.Wait()
-}
diff --git a/serve.go b/serve.go
new file mode 100644
index 0000000..0a930c3
--- /dev/null
+++ b/serve.go
@@ -0,0 +1,44 @@
+// +build !appengine
+
+package goji
+
+import (
+	"flag"
+	"log"
+	"net/http"
+
+	"github.com/zenazn/goji/bind"
+	"github.com/zenazn/goji/graceful"
+)
+
+func init() {
+	bind.WithFlag()
+	if fl := log.Flags(); fl&log.Ltime != 0 {
+		log.SetFlags(fl | log.Lmicroseconds)
+	}
+}
+
+// Serve starts Goji using reasonable defaults.
+func Serve() {
+	if !flag.Parsed() {
+		flag.Parse()
+	}
+
+	// Install our handler at the root of the standard net/http default mux.
+	// This allows packages like expvar to continue working as expected.
+	http.Handle("/", DefaultMux)
+
+	listener := bind.Default()
+	log.Println("Starting Goji on", listener.Addr())
+
+	graceful.HandleSignals()
+	bind.Ready()
+
+	err := graceful.Serve(listener, http.DefaultServeMux)
+
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	graceful.Wait()
+}
diff --git a/serve_appengine.go b/serve_appengine.go
new file mode 100644
index 0000000..edf9a2d
--- /dev/null
+++ b/serve_appengine.go
@@ -0,0 +1,13 @@
+// +build appengine
+
+package goji
+
+import "net/http"
+
+// Serve starts Goji using reasonable defaults.
+func Serve() {
+	// Install our handler at the root of the standard net/http default mux.
+	// This is required for App Engine, and also allows packages like expvar
+	// to continue working as expected.
+	http.Handle("/", DefaultMux)
+}