diff --git a/dune/tectonic/myconvexproblem.hh b/dune/tectonic/myconvexproblem.hh
index e484d6a902d7793c716410359ad78a91a9697ec9..d630c152520b3be4fb4378af19b6bd73120383ee 100644
--- a/dune/tectonic/myconvexproblem.hh
+++ b/dune/tectonic/myconvexproblem.hh
@@ -1,7 +1,5 @@
 // Based on dune/tnnmg/problem-classes/convexproblem.hh
 // Allows phi to be const; does away with everything we do not need
-// convexproblem.hh also currently uses *(NULL) which leads to undefined
-// behaviour
 
 #ifndef MY_CONVEX_PROBLEM_HH
 #define MY_CONVEX_PROBLEM_HH