diff --git a/components/log/include/esp_log.h b/components/log/include/esp_log.h
index cdbe74f697..c09629bac1 100644
--- a/components/log/include/esp_log.h
+++ b/components/log/include/esp_log.h
@@ -269,7 +269,7 @@ void esp_log_writev(esp_log_level_t level, const char* tag, const char* format,
 #define LOG_RESET_COLOR
 #endif //CONFIG_LOG_COLORS
 
-#define LOG_FORMAT(letter, format)  LOG_COLOR_ ## letter #letter " (%d) %s: " format LOG_RESET_COLOR "\n"
+#define LOG_FORMAT(letter, format)  LOG_COLOR_ ## letter #letter " (%u) %s: " format LOG_RESET_COLOR "\n"
 #define LOG_SYSTEM_TIME_FORMAT(letter, format)  LOG_COLOR_ ## letter #letter " (%s) %s: " format LOG_RESET_COLOR "\n"
 
 /** @endcond */