diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MainActivity.java b/mpmaster/src/main/java/com/xypower/mpmaster/MainActivity.java
index 1479ccf2..fcc98e87 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MainActivity.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MainActivity.java
@@ -186,7 +186,7 @@ public class MainActivity extends AppCompatActivity {
         if (TextUtils.isEmpty(appConfig.cmdid)) {
             stringBuilder.append("CMDID：" + SysApi.getSerialNo(getApplicationContext()) + " (SN)");
          } else {
-            stringBuilder.append("CMDID："appConfig.cmdid);
+            stringBuilder.append("CMDID：" + appConfig.cmdid);
         }