diff --git a/server.go b/server.go
index c79e74e..605ab49 100644
--- a/server.go
+++ b/server.go
@@ -704,6 +704,10 @@ type HttpApiHandlerContainer struct {
 }
 
 func (hc *HttpApiHandlerContainer) RegistReceiver(receiver HttpApiReceiver) {
+	if hc.methods == nil {
+		hc.methods = make(map[string]apiFuncType)
+	}
+
 	for k, v := range receiver.methods {
 		logger.Println("http api registered :", k)
 		hc.methods[k] = v