diff --git a/pip-frame.el b/pip-frame.el
index 120afe1..6ca28bc 100644
--- a/pip-frame.el
+++ b/pip-frame.el
@@ -58,6 +58,7 @@ Usually, the value should be larger than 0 and much smaller than 1."
 (defcustom pip-frame-parameters
   '((left . 0.9)
     (top .  0.9)
+    (tab-bar-lines . 0)
     (minibuffer . nil))
   "Alist of frame parameters to use for the PIP frame.
 The frame size is determined automatically using `pip-frame-scale'