1 files changed, 1 insertions, 1 deletions
diff --git a/core/modules/vbox-src/data/opt/openslx/scripts/systemd-vbox_env b/core/modules/vbox-src/data/opt/openslx/scripts/systemd-vbox_env
index a7049f81..f923f2c2 100755
--- a/core/modules/vbox-src/data/opt/openslx/scripts/systemd-vbox_env
+++ b/core/modules/vbox-src/data/opt/openslx/scripts/systemd-vbox_env
@@ -45,7 +45,7 @@ fi
 
 # check/create vboxusers group
 getent group vboxusers || addgroup --system vboxusers
-adduser demo vboxusers
+[[ " $( id -Gn demo ) " = *" vboxusers "* ]] || adduser demo vboxusers
 
 # set their permissions
 chmod 0600 /dev/vboxdrv /dev/vboxnetctl