diff --git a/cogl/cogl-matrix-mesa.c b/cogl/cogl-matrix-mesa.c
index 205b45b5a..d097f2853 100644
--- a/cogl/cogl-matrix-mesa.c
+++ b/cogl/cogl-matrix-mesa.c
@@ -1522,7 +1522,7 @@ _math_matrix_update_type_and_flags (CoglMatrix *matrix)
 /*@}*/
 
 
-/**
+/*
  * Test if the given matrix preserves vector lengths.
  */
 gboolean