diff --git a/IR_Decoder.h b/IR_Decoder.h
index c69f2a6..bcec29a 100644
--- a/IR_Decoder.h
+++ b/IR_Decoder.h
@@ -85,7 +85,8 @@ public:
             _dataRawSize = len;
             _err = err;
             _bitPeriod = rTime;
-            for (uint8_t i = 0; i < len && len<bytePerPack; i++) { _data[i] = ptr[i]; }
+            memset(_data, 0, bytePerPack);
+            for (uint8_t i = 0; i < len && len < bytePerPack; i++) { _data[i] = ptr[i]; }
             _msgType = _data[0];
             ini();
             _isAvaliable = true;