diff --git a/main.go b/main.go
index 6b9f4d49a..ef5724ac2 100644
--- a/main.go
+++ b/main.go
@@ -158,7 +158,7 @@ func main() {
 					fmt.Println("accept error:", err)
 					break
 				}
-				globals.SugarLogger.Debugf("tcp socket:", utils.Format4Output(c, true))
+				globals.SugarLogger.Debugf("tcp socket: %v", utils.Format4Output(c, true))
 				go handleConn(c)
 			}
 		}