diff --git a/smb_config/run.sh b/smb_config/run.sh
index 72efea0..e292222 100644
--- a/smb_config/run.sh
+++ b/smb_config/run.sh
@@ -10,7 +10,7 @@ PASSWORD=$(jq --raw-output ".password // empty" $CONFIG_PATH)
 
 sed -i "s/%%WORKGROUP%%/$WORKGROUP/g" /etc/smb.conf
 
-if [ GUEST == "true" ]; then
+if [ $GUEST == "true" ]; then
     echo "  group ok = yes" >> /etc/smb.conf
     echo "  public = yes" >> /etc/smb.conf
 else