diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index 8bf67483b9..524bf6d7d8 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -2848,6 +2848,7 @@ _exit:
     uError("failed to persist global config at line:%d, since %s", lino, tstrerror(code));
   }
   (void)taosCloseFile(&pConfigFile);
+  taosMemoryFree(serialized);
   return code;
 }
 
@@ -2887,6 +2888,7 @@ _exit:
     uError("failed to persist local config at line:%d, since %s", lino, tstrerror(code));
   }
   (void)taosCloseFile(&pConfigFile);
+  taosMemoryFree(serialized);
   return code;
 }