diff --git a/tasmota/support.ino b/tasmota/support.ino
index 1411a1953..8c2aadeb8 100644
--- a/tasmota/support.ino
+++ b/tasmota/support.ino
@@ -1972,7 +1972,7 @@ void AddLog(uint32_t loglevel)
       TasmotaGlobal.web_log_index++;       // Index 0 is not allowed as it is the end of char string
     }
     while (TasmotaGlobal.web_log_index == TasmotaGlobal.web_log[0] ||  // If log already holds the next index, remove it
-           strlen(TasmotaGlobal.web_log) + strlen(TasmotaGlobal.log_data) + 13 > WEB_LOG_SIZE)  // 13 = web_log_index + mxtime + '\1' + '\0'
+           strlen(TasmotaGlobal.web_log) + strlen(TasmotaGlobal.log_data) + strlen(mxtime) + 4 > WEB_LOG_SIZE)  // 4 = web_log_index + '\1' + '\0'
     {
       char* it = TasmotaGlobal.web_log;
       it++;                                // Skip web_log_index