diff --git a/include/main.h b/include/main.h
index 5f42a05..d4f546d 100644
--- a/include/main.h
+++ b/include/main.h
@@ -8,7 +8,7 @@
 #define PUMP_COUNT		(4)
 
 static QueueHandle_t gpio_evt_queue = NULL;
-nvs_handle_t config_handle;
+extern nvs_handle_t config_handle;
 
 extern uint8_t mac[6];
 
diff --git a/main/main.c b/main/main.c
index fc1bfce..2c71611 100644
--- a/main/main.c
+++ b/main/main.c
@@ -19,6 +19,7 @@
 static const char *TAG = "BARBACK";
 
 uint8_t mac[6];
+nvs_handle_t config_handle = {};
 
 void app_main(void) {
   esp_err_t err = nvs_flash_init();
@@ -33,7 +34,7 @@ void app_main(void) {
   if (err != ESP_OK) {
     printf("Error (%s) opening NVS handle!\n", esp_err_to_name(err));
   } else {
-    ESP_LOGI(TAG, "config_handle: %d", config_handle);
+    ESP_LOGI(TAG, "config_handle: %d", (int)config_handle);
   }
 
   esp_efuse_mac_get_default((uint8_t*)&mac);