diff --git a/Packages/Kernel_d/doc_tex/kernel_d/Ref_d/main.tex b/Packages/Kernel_d/doc_tex/kernel_d/Ref_d/main.tex
index f48b0e497a2..fcfbb8629a6 100644
--- a/Packages/Kernel_d/doc_tex/kernel_d/Ref_d/main.tex
+++ b/Packages/Kernel_d/doc_tex/kernel_d/Ref_d/main.tex
@@ -32,6 +32,7 @@
 \input{Ref_d/Segment_d.tex}
 \input{Ref_d/Hyperplane_d.tex}
 \input{Ref_d/Sphere_d.tex}
+\input{Ref_d/Iso_box_d.tex}
 \input{Ref_d/Aff_transformation_d.tex}
 
 \clearpage