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-rw-r--r--macros/luatex/optex/base/references.opm2
1 files changed, 1 insertions, 1 deletions
diff --git a/macros/luatex/optex/base/references.opm b/macros/luatex/optex/base/references.opm
index e00a0a2fda..3640879703 100644
--- a/macros/luatex/optex/base/references.opm
+++ b/macros/luatex/optex/base/references.opm
@@ -80,7 +80,7 @@
\_def\_printlabel#1{}
\_def\_showlabels {%
- \_def\_printlabel##1{\_vbox to0pt{\_vss\_llap{\_labelfont[##1]}\_kern1.7ex}}%
+ \_def\_printlabel##1{\_vbox to\_zo{\_vss\_llap{\_labelfont[##1]}\_kern1.7ex}}%
\_fontdef\_labelfont{\_setfontsize{at10pt}\setfontcolor{blue}\_tt}
}
\_public \showlabels ;