diff --git a/libavutil/csp.h b/libavutil/csp.h
index 37544449c6..18ef208adf 100644
--- a/libavutil/csp.h
+++ b/libavutil/csp.h
@@ -24,9 +24,14 @@
 #include "rational.h"
 
 /**
- * @file Colorspace value utility functions for libavutil.
+ * @file
+ * Colorspace value utility functions for libavutil.
+ * @ingroup lavu_math_csp
  * @author Ronald S. Bultje <rsbultje@gmail.com>
  * @author Leo Izen <leo.izen@gmail.com>
+ */
+
+/**
  * @defgroup lavu_math_csp Colorspace Utility
  * @ingroup lavu_math
  * @{