diff --git a/interfaces/native/innerkits/hisysevent_easy/hisysevent_easy.c b/interfaces/native/innerkits/hisysevent_easy/hisysevent_easy.c
index c910092b4dd587d7a1d24ad9f0dba5c66d257893..93a8715f40965236591fb2226d8da374f42b1d62 100644
--- a/interfaces/native/innerkits/hisysevent_easy/hisysevent_easy.c
+++ b/interfaces/native/innerkits/hisysevent_easy/hisysevent_easy.c
@@ -93,6 +93,7 @@ static int GetRealPid(void)
     }
 
     char buf[LINE_BUF_SIZE];
+    (void)memset_s(buf, sizeof(buf), 0, sizeof(buf));
     int pos = 0;
     char curChar = 0;
     while (1) {
@@ -106,7 +107,7 @@ static int GetRealPid(void)
                 break;
             }
             pos = 0;
-            (void)memset_s(buf, sizeof(buf), '\0', sizeof(buf));
+            (void)memset_s(buf, sizeof(buf), 0, sizeof(buf));
             continue;
         }
         buf[pos] = curChar;