diff --git a/src/pyj/widgets.pyj b/src/pyj/widgets.pyj
index 29f2e6fae6..3e704aa0e2 100644
--- a/src/pyj/widgets.pyj
+++ b/src/pyj/widgets.pyj
@@ -26,8 +26,8 @@ create_button.style += build_rule('button.calibre-push-button:active', transform
 create_button.style += build_rule('button.calibre-push-button:focus', outline='none')
 create_button.style += build_rule('button.calibre-push-button::-moz-focus-inner', border='0')
 
-def create_spinner(sz='lg'):
-    return E.i(class_='fa fa-spin fa-spinner fa-' + sz)
+def create_spinner():
+    return E.i(class_='fa fa-spin fa-spinner')
 
 def get_widget_css():
     ans = create_button.style