diff --git a/firmware/esp32/main/main.cpp b/firmware/esp32/main/main.cpp
index f1e1f8b..90697ae 100644
--- a/firmware/esp32/main/main.cpp
+++ b/firmware/esp32/main/main.cpp
@@ -6,7 +6,7 @@
 #include "esp_pm.h"
 #include "esp_task_wdt.h"
 #include "wifi.hpp"
-#include "i2c.cpp"
+#include "i2c.hpp"
 #include "mqtt.hpp"
 
 #define WATCHDOG_KEEPALIVE_MS 8000