diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
index 3e9b8377..ff4b4da4 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
@@ -558,7 +558,7 @@ public class AppMaster {
             updateCma(ip, port);
         } else if (TextUtils.equals(cmd, CMD_SET_APP_HB)) {
             int hb = jsonObject.optInt("value_int", 0);
-            mService.logger.warning("Recv Set HB Duration Cmd: " " duration=" + Integer.toString(hb));
+            mService.logger.warning("Recv Set HB Duration Cmd: duration=" + Integer.toString(hb));
             updateHeartbeatDuration(hb);
         } else if (TextUtils.equals(cmd, CMD_SET_MNTN)) {
             String ip = jsonObject.optString("value_str", null);