diff --git a/py-yt-dlp-gui b/py-yt-dlp-gui
index 15608a8..c5199cf 100755
--- a/py-yt-dlp-gui
+++ b/py-yt-dlp-gui
@@ -137,7 +137,7 @@ class wnd(Gtk.Window):
 
                 h = []
                 for f in info['formats']:
-                    if isinstance(f['height'], int) and f['height'] not in h:
+                    if ('height' in f) and isinstance(f['height'], int) and f['height'] not in h:
                         h.append(f['height'])
                         self.controls['resolution']['e'].append_text(
                             "{}p".format(f['height']))