diff --git a/installers/common.sh b/installers/common.sh
index b94da1a6..b547c2a3 100755
--- a/installers/common.sh
+++ b/installers/common.sh
@@ -213,7 +213,7 @@ function check_for_old_configs() {
     fi
 
     for file in /etc/systemd/network/raspap-*.net*; do
-        if [-f "${file}" ]; then
+        if [ -f "${file}" ]; then
             filename = $(basename $file)
             sudo cp "$file" "${raspap_dir}/backups/${filename}.`date +%F-%R`"
             sudo ln -sf "${raspap_dir}/backups/${filename}.`date +%F-%R`" "${raspap_dir}/backups/${filename}"