diff --git a/zh_bh1750.c b/zh_bh1750.c
index 3bc1655..ee01123 100644
--- a/zh_bh1750.c
+++ b/zh_bh1750.c
@@ -159,11 +159,11 @@ READ:
     }
     if (_init_config.operation_mode == HIGH_RESOLUTION_2)
     {
-        *data = raw_data * (1 / 1.2 * (69.0 / _sensivity) / 2);
+        *data = raw_data * (1 / 1.2 * ((float)SENSITIVITY_DEFAULT / _sensivity) / 2);
     }
     else
     {
-        *data = raw_data * (1 / 1.2 * (69.0 / _sensivity));
+        *data = raw_data * (1 / 1.2 * ((float)SENSITIVITY_DEFAULT / _sensivity));
     }
     ESP_LOGI(TAG, "BH1750 read success.");
     return ESP_OK;