summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.reactions.code.tex
diff options
context:
space:
mode:
Diffstat (limited to 'Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.reactions.code.tex')
-rw-r--r--Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.reactions.code.tex3
1 files changed, 2 insertions, 1 deletions
diff --git a/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.reactions.code.tex b/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.reactions.code.tex
index 629d3f89ca2..f261611bfb0 100644
--- a/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.reactions.code.tex
+++ b/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.reactions.code.tex
@@ -278,7 +278,8 @@
% #4: argument list ({#2}{#3}...)
\cs_new_protected:Npn \chemmacros_declare_reaction_env:nnnn #1#2#3#4
{
- \exp_args:Nnx \DeclareDocumentEnvironment {#1} { !O{} \prg_replicate:nn {#3+0} {m} }
+ \exp_args:Nnx \DeclareDocumentEnvironment {#1}
+ { \int_compare:nT { #3+0 = 0 } {!} O{} \prg_replicate:nn {#3+0} {m} }
{
\chemmacros_add_reaction_description:n {##1}
\__chemmacros_begin_reaction: