diff --git a/packages/app-desktop/gui/Button/Button.tsx b/packages/app-desktop/gui/Button/Button.tsx
index 56e248ed3..4dea7c565 100644
--- a/packages/app-desktop/gui/Button/Button.tsx
+++ b/packages/app-desktop/gui/Button/Button.tsx
@@ -256,6 +256,9 @@ const Button = React.forwardRef((props: Props, ref: any) => {
iconOnly={iconOnly}
onClick={onClick}
+ // When there's no title, the button needs a label. In this case, fall back
+ // to the tooltip.
+ aria-label={props.title ? undefined : props.tooltip}
aria-disabled={props.disabled}
aria-expanded={props['aria-expanded']}
aria-controls={props['aria-controls']}
diff --git a/packages/app-desktop/gui/ShareFolderDialog/ShareFolderDialog.tsx b/packages/app-desktop/gui/ShareFolderDialog/ShareFolderDialog.tsx
index 76895ef4e..e3eb8b159 100644
--- a/packages/app-desktop/gui/ShareFolderDialog/ShareFolderDialog.tsx
+++ b/packages/app-desktop/gui/ShareFolderDialog/ShareFolderDialog.tsx
@@ -321,7 +321,13 @@ function ShareFolderDialog(props: Props) {
{shareUser.user.email}
{dropdown}
-