diff --git a/dev/initial-setup.sh b/dev/initial-setup.sh
index cb81f1e7a6..83e5eec914 100755
--- a/dev/initial-setup.sh
+++ b/dev/initial-setup.sh
@@ -8,7 +8,7 @@ git clone git@github.com:mailpoet/mailpoet-premium.git 2>/dev/null \
 # to avoid any potential problems with file permissions (mainly on Linux).
 cat <<EOT > .env
 UID=$(id -u)
-UID=$(id -g)
+GID=$(id -g)
 EOT
 
 # create plugin .env files if they don't exist