diff --git a/entrypoint.sh b/entrypoint.sh
index ab5940d13427ef83a22b805effe8861d38930138..05c1a29dd10e4390854659a1f70e8b10ad949be8 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -66,7 +66,7 @@ backup () {
 
     # ZIP BACKUP #
     cd "$TEMPDIR"
-    tar -zcvf $"{BACKUP_PREFIX}-${NOW}.tar.gz" *.sql
+    tar -zcvf "${BACKUP_PREFIX}-${NOW}.tar.gz" *.sql
     echo "---"
     du -h "${BACKUP_PREFIX}-${NOW}.tar.gz"
     cd - > /dev/null