diff --git a/po/arch-update.pot b/po/arch-update.pot
index 22181d4..ecdacdd 100644
--- a/po/arch-update.pot
+++ b/po/arch-update.pot
@@ -506,6 +506,11 @@ msgid ""
 "from your app menu"
 msgstr ""
 
+#: src/script/arch-update.sh:763
+#, sh-format
+msgid "There's already a running instance of the Arch-Update systray applet"
+msgstr ""
+
 #: src/script/arch-update-tray.py:118
 msgid "Run Arch-Update"
 msgstr ""
diff --git a/po/fr.po b/po/fr.po
index c81b2d3..2631b1e 100644
--- a/po/fr.po
+++ b/po/fr.po
@@ -548,6 +548,11 @@ msgstr ""
 "immédiatement, vous pouvez lancer l'application \"Arch-Update Systray Applet\" "
 "depuis votre menu d'application"
 
+#: src/script/arch-update.sh:763
+#, sh-format
+msgid "There's already a running instance of the Arch-Update systray applet"
+msgstr "Il y a déjà une instance de l'applet systray d'Arch-Update en cours d'exécution"
+
 #: src/script/arch-update-tray.py:118
 msgid "Run Arch-Update"
 msgstr "Lancer Arch-Update"
diff --git a/src/script/arch-update.sh b/src/script/arch-update.sh
index 7a7a4b1..45305ff 100755
--- a/src/script/arch-update.sh
+++ b/src/script/arch-update.sh
@@ -759,6 +759,11 @@ case "${option}" in
 				state_up_to_date
 			fi
 
+			if ps -ef | grep "[a]rch-update-tray"; then
+				error_msg "$(eval_gettext "There's already a running instance of the Arch-Update systray applet")"
+				exit 3
+			fi
+
 			arch-update-tray || exit 3
 		fi
 	;;