diff --git a/src/pyj/read_book/create_annotation.pyj b/src/pyj/read_book/create_annotation.pyj
index db49ed4908..ee31ee77f8 100644
--- a/src/pyj/read_book/create_annotation.pyj
+++ b/src/pyj/read_book/create_annotation.pyj
@@ -177,6 +177,8 @@ class CreateAnnotation:
             cb.style.backgroundColor = get_color('window-background')
             cb.style.boxSizing = 'border-box'
             cb.style.padding = '2px'
+            cb.style.border = 'solid 2px currentColor'
+            cb.style.borderRadius = '4px'
             cb.classList.add('simple-link')
             cb.addEventListener('click', def(ev):
                 ev.preventDefault(), ev.stopPropagation()