1 files changed, 6 insertions, 2 deletions
diff --git a/macros/latex/contrib/l3kernel/expl3.dtx b/macros/latex/contrib/l3kernel/expl3.dtx
index a2f5c86cbe..16632dbd99 100644
--- a/macros/latex/contrib/l3kernel/expl3.dtx
+++ b/macros/latex/contrib/l3kernel/expl3.dtx
@@ -24,7 +24,7 @@
 %
 %<*driver|generic|package|2ekernel>
 %</driver|generic|package|2ekernel>
-\def\ExplFileDate{2021-05-07}%
+\def\ExplFileDate{2021-05-11}%
 %<*driver>
 \documentclass[full]{l3doc}
 \usepackage{graphicx}
@@ -51,7 +51,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2021-05-07}
+% \date{Released 2021-05-11}
 %
 % \maketitle
 %
@@ -1756,11 +1756,15 @@
 %    \end{macrocode}
 % \end{macro}
 %
+% \begin{macro}{\g__kernel_backend_header_bool}
 % Load the dynamic code and standard back-end.
 %    \begin{macrocode}
 \sys_everyjob:
+\bool_new:N \g__kernel_backend_header_bool
+\bool_gset_true:N \g__kernel_backend_header_bool
 \sys_load_backend:n { }
 %    \end{macrocode}
+% \end{macro}
 %
 %  For the generic loader, a few final steps to take. Turn of \cs{expl3}
 %  syntax and tidy up the small number of temporary changes.