diff --git a/writer.h b/writer.h
index 4f5c17d..58dc3ec 100644
--- a/writer.h
+++ b/writer.h
@@ -12,6 +12,7 @@ struct VideoSpecs {
   uint32_t width, height, quality = 95;
   int fps;
   double exposureTime;
+  double detectorGain;
   Pylon::EPixelType pixelType;
   Pylon::EImageOrientation orientation;
 };