diff --git a/bind/einhorn.go b/bind/einhorn.go
index d18b694..e695c0e 100644
--- a/bind/einhorn.go
+++ b/bind/einhorn.go
@@ -1,4 +1,4 @@
-// +build !windows,!appengine
+// +build !windows
 
 package bind
 
diff --git a/bind/einhorn_stub.go b/bind/einhorn_stub.go
index 18cd3b3..093707f 100644
--- a/bind/einhorn_stub.go
+++ b/bind/einhorn_stub.go
@@ -1,4 +1,4 @@
-// +build windows appengine
+// +build windows
 
 package bind
 
diff --git a/bind/systemd.go b/bind/systemd.go
index 292f509..e7cd8e4 100644
--- a/bind/systemd.go
+++ b/bind/systemd.go
@@ -1,4 +1,4 @@
-// +build !windows,!appengine
+// +build !windows
 
 package bind
 
diff --git a/bind/systemd_stub.go b/bind/systemd_stub.go
index 1ac1bad..4ad4d20 100644
--- a/bind/systemd_stub.go
+++ b/bind/systemd_stub.go
@@ -1,4 +1,4 @@
-// +build windows appengine
+// +build windows
 
 package bind
 
diff --git a/graceful/einhorn.go b/graceful/einhorn.go
index ad78d1c..082d1c4 100644
--- a/graceful/einhorn.go
+++ b/graceful/einhorn.go
@@ -1,4 +1,4 @@
-// +build !windows,!appengine
+// +build !windows
 
 package graceful
 
diff --git a/serve_appengine.go b/serve_appengine.go
index 2d39665..88dc7a8 100644
--- a/serve_appengine.go
+++ b/serve_appengine.go
@@ -2,7 +2,16 @@
 
 package goji
 
-import "net/http"
+import (
+	"log"
+	"net/http"
+)
+
+func init() {
+	if fl := log.Flags(); fl&log.Ltime != 0 {
+		log.SetFlags(fl | log.Lmicroseconds)
+	}
+}
 
 // Serve starts Goji using reasonable defaults.
 func Serve() {