2 files changed, 2 insertions, 2 deletions

diff --git a/arabluatex.dtx b/arabluatex.dtx
index b090d98..8257727 100644
--- a/arabluatex.dtx
+++ b/arabluatex.dtx
@@ -153,7 +153,7 @@
 \usepackage{fontspec}
 \usepackage{microtype}
 \babelfont{rm}[BoldItalicFont={Old Standard T Italic},
-BoldItalicFeatures={RawFeature={embolden=2}}]{Old Standard T}
+BoldItalicFeatures={RawFeature={+embolden=2}}]{Old Standard T}
 \usepackage{metalogox}
 \usepackage{arabluatex}[2019/03/24]
 \SetArbUp{\textsuperscript{\thinspace#1}} % Old Standard needs this
diff --git a/samples/al-Jahiz.tex b/samples/al-Jahiz.tex
index abae33e..0b98bf2 100644
--- a/samples/al-Jahiz.tex
+++ b/samples/al-Jahiz.tex
@@ -7,7 +7,7 @@
 \usepackage[english]{babel}
 \usepackage{fontspec}
 \babelfont{rm}[BoldItalicFont={Old Standard T Italic},
-BoldItalicFeatures={RawFeature={embolden=2}}]{Old Standard T}
+BoldItalicFeatures={RawFeature={+embolden=2}}]{Old Standard T}
 \usepackage{filecontents}
 
 \usepackage{xcolor}