diff --git a/config.go b/config.go
index 2761e7cb..15d11386 100644
--- a/config.go
+++ b/config.go
@@ -353,7 +353,7 @@ func (b *beegoAppConfig) String(key string) string {
 }
 
 func (b *beegoAppConfig) Strings(key string) []string {
-	if v := b.innerConfig.Strings(BConfig.RunMode + "::" + key); v[0] != "" {
+	if v := b.innerConfig.Strings(BConfig.RunMode + "::" + key); len(v) > 0 {
 		return v
 	}
 	return b.innerConfig.Strings(key)
diff --git a/context/acceptencoder.go b/context/acceptencoder.go
index e73744f5..fc2775ce 100644
--- a/context/acceptencoder.go
+++ b/context/acceptencoder.go
@@ -49,6 +49,7 @@ func InitGzip(cf config.Configer) {
 	}
 	methods := cf.DefaultStrings("includedMethods", []string{"GET"})
 	getMethodOnly = (len(methods) == 0) || (len(methods) == 1 && strings.ToUpper(methods[0]) == "GET")
+	includedMethods = make(map[string]bool, len(methods))
 	for _, v := range methods {
 		includedMethods[strings.ToUpper(v)] = true
 	}