diff --git a/webcam.cpp b/webcam.cpp
index 3891528..a5c8fd8 100644
--- a/webcam.cpp
+++ b/webcam.cpp
@@ -336,7 +336,8 @@ void Webcam::init_device(void)
         {
             // note that libv4l2 (look for 'v4l-utils') provides helpers
             // to manage conversions
-            throw runtime_error("Webcam does not support the requested format. Support for more formats need to be added!");
+            throw runtime_error("Webcam does not support the requested format. Support for more formats need to be added! video format is "
+                + std::to_string(fmt.fmt.pix.pixelformat));
         }
 
         /* Note VIDIOC_S_FMT may change width and height. */