diff --git a/source/containers.tex b/source/containers.tex
index 63cf29baa1..bcd95ead2f 100644
--- a/source/containers.tex
+++ b/source/containers.tex
@@ -23733,7 +23733,7 @@
 
 \begin{itemdecl}
 template<class... Indices>
-constexpr size_t operator()(Indices... idxs) const noexcept;
+constexpr index_type operator()(Indices... idxs) const noexcept;
 \end{itemdecl}
 
 \begin{itemdescr}
@@ -24368,7 +24368,7 @@
 \indexlibrarymember{layout_right_padded::mapping}{operator()}%
 \begin{itemdecl}
 template<class... Indices>
-constexpr size_t operator()(Indices... idxs) const noexcept;
+constexpr index_type operator()(Indices... idxs) const noexcept;
 \end{itemdecl}
 
 \begin{itemdescr}