diff --git a/ESP32-IDF_ESPNOW-Transmitter/main/system_health.h b/ESP32-IDF_ESPNOW-Transmitter/main/system_health.h
index 0b1064f9f..10d806702 100644
--- a/ESP32-IDF_ESPNOW-Transmitter/main/system_health.h
+++ b/ESP32-IDF_ESPNOW-Transmitter/main/system_health.h
@@ -1,7 +1,7 @@
 #ifndef ESPNOW_EXAMPLE_H
 #define ESPNOW_EXAMPLE_H
 
-void chip_sensor_init ();
+static void chip_sensor_init ();
 void temp_sensor_task (void *arg);
 
 #endif
\ No newline at end of file