diff --git a/documentation/ethercat_doc.tex b/documentation/ethercat_doc.tex
index 2e10b0a0..cef4468d 100644
--- a/documentation/ethercat_doc.tex
+++ b/documentation/ethercat_doc.tex
@@ -3165,6 +3165,10 @@ interface) & \\
 \lstinline+--with-devices+ & Number of Ethernet devices for redundant
 operation ($>1$ switches redundancy on) & 1\\
 
+\lstinline+--with-systemdsystemunitdir+ & Systemd unit directory ("no"
+disables service file installation)
+& auto \\
+
 \lstinline+--enable-debug-if+ & Create a debug interface for each master & no\\
 
 \lstinline+--enable-debug-ring+ & Create a debug ring to record frames & no\\
diff --git a/documentation/ethercat_doc_fr.tex b/documentation/ethercat_doc_fr.tex
index 9d19e7bd..d9126bf9 100644
--- a/documentation/ethercat_doc_fr.tex
+++ b/documentation/ethercat_doc_fr.tex
@@ -3577,6 +3577,8 @@ Xenomai et interface RTDM) & \\
 \lstinline+--with-devices+ & Nombre de p\'eriph\'eriques Ethernet pour
 l'op\'eration redondante ($>1$ commute la redondance) & 1\\
 
+\lstinline+--with-systemdsystemunitdir+ & Chemin Systemd & auto \\
+
 \lstinline+--enable-debug-if+ & Cr\'eer une interface de d\'everminage pour
 chaque ma\^itre & non\\