diff --git a/src/libcamera/media_device.cpp b/src/libcamera/media_device.cpp
index 1bd4f43..9fbc5a7 100644
--- a/src/libcamera/media_device.cpp
+++ b/src/libcamera/media_device.cpp
@@ -216,7 +216,7 @@ int MediaDevice::populate()

 /**
  * \fn MediaDevice::valid()
- * \brief Query whether the media graph is valid
+ * \brief Query whether the media graph has been populated and is valid
  * \return true if the media graph is valid, false otherwise
  */