diff --git a/debian/usr/bin/minecraft-pi b/debian/usr/bin/minecraft-pi
index 9ab9eb7f..fa134af4 100755
--- a/debian/usr/bin/minecraft-pi
+++ b/debian/usr/bin/minecraft-pi
@@ -20,8 +20,9 @@ if [ -z "${MCPI_SUBSHELL}" ]; then
         if ! command -v adduser &> /dev/null
         then
             pkexec usermod -aG "$(whoami)" docker
+        else
+            pkexec adduser "$(whoami)" docker
         fi
-        pkexec adduser "$(whoami)" docker
     fi
     exec sg docker "env MCPI_SUBSHELL=1 \"$(realpath -e "$0")\""
 fi