diff --git a/frameworks/mini/hiview_output_log.c b/frameworks/mini/hiview_output_log.c
index 7b948c738544c210b3abecf08d218c62b3a0bfa4..bce687f633bf8f0d2bc3652621f31c0ac6fa9873 100644
--- a/frameworks/mini/hiview_output_log.c
+++ b/frameworks/mini/hiview_output_log.c
@@ -500,13 +500,13 @@ static void RemovePrivacyFmt(const char* fmtStr, size_t fmtLen, char* arr, size_
 static int32 LogDebugValuesFmt(char *desStrPtr, int32 desLen, const HiLogContent *logContentPtr)
 {
     int32 ret = 0;
-    size_t fmtLen = strlen(logContentPtr->commonContent.fmt);
+    size_t fmtLen = strlen(logContentPtr->commonContent.fmt) + 1;
     char *fmt = (char *)malloc(fmtLen * sizeof(char));
     if (fmt == NULL) {
         return -1;
     }
     memset_s(fmt, fmtLen, 0, fmtLen);
-    RemovePrivacyFmt(logContentPtr->commonContent.fmt, fmtLen, fmt, fmtLen);
+    RemovePrivacyFmt(logContentPtr->commonContent.fmt, fmtLen - 1, fmt, fmtLen - 1);
     switch (logContentPtr->commonContent.valueNumber) {
         case LOG_MULTI_PARA_0:
             ret = strncpy_s(desStrPtr, desLen, fmt, desLen - 1);