diff --git a/compiler/literate/latex.ml b/compiler/literate/latex.ml
index db9b03519..f652175a6 100644
--- a/compiler/literate/latex.ml
+++ b/compiler/literate/latex.ml
@@ -60,7 +60,7 @@ let wrap_latex
 %s
 \usepackage{fancyvrb,fvextra}
 \usepackage{color}
-\usepackage{longtable}
+\usepackage{calc,longtable}
 \usepackage{booktabs,tabularx}
 \usepackage{newunicodechar}
 \usepackage{textcomp}