diff --git a/core/processor/ProcessorMergeMultilineLogNative.cpp b/core/processor/ProcessorMergeMultilineLogNative.cpp
index 1ee814f291..3cb8ac9876 100644
--- a/core/processor/ProcessorMergeMultilineLogNative.cpp
+++ b/core/processor/ProcessorMergeMultilineLogNative.cpp
@@ -93,7 +93,7 @@ bool ProcessorMergeMultilineLogNative::Init(const Json::Value& config) {
         = GetMetricsRecordRef().CreateCounter(METRIC_PROC_MERGE_MULTILINE_LOG_MERGED_RECORDS_SIZE_BYTES);
     mProcUnmatchedEventsCnt
         = GetMetricsRecordRef().CreateCounter(METRIC_PROC_MERGE_MULTILINE_LOG_UNMATCHED_RECORDS_TOTAL);
-    mProcUnmatchedEventsBytes
+    // mProcUnmatchedEventsBytes
         = GetMetricsRecordRef().CreateCounter(METRIC_PROC_MERGE_MULTILINE_LOG_UNMATCHED_RECORDS_SIZE_BYTES);
 
     return true;