diff --git a/content/data-structures/chapter.tex b/content/data-structures/chapter.tex
index 846c28a21..9cf078a66 100644
--- a/content/data-structures/chapter.tex
+++ b/content/data-structures/chapter.tex
@@ -10,8 +10,8 @@ \chapter{Data structures}
 % \kactlimport{UnionFind.h}
 \kactlimport{Sparse2D.h}
 \kactlimport{UnionFindRollback.h}
-\kactlimport{SubMatrix.h}
-\kactlimport{Matrix.h}
+% \kactlimport{SubMatrix.h}
+% \kactlimport{Matrix.h}
 \kactlimport{LineContainer.h}
 \kactlimport{Treap.h}
 % \kactlimport{SegTreeBinLift.h}