diff --git a/common/common_func.cpp b/common/common_func.cpp
index 1079ab1..862557c 100644
--- a/common/common_func.cpp
+++ b/common/common_func.cpp
@@ -1167,7 +1167,7 @@ int GetSysStatusCMT(int& cpu_use,int& mem_use,int& disk_remain,int& cpu_temp)
     int temp = getSysIntValue(key);
     cpu_use = rateUser;
     mem_use = fMemRate * 100;
-    disk_remain = atoi(strhardFree.substr(0, strhardFree.length() - 1).c_str());
+    disk_remain = atoi(hardFree);
     cpu_temp = temp / 1000.0;
 }
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