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-rw-r--r--src/settings/components/form/blacklist-form.jsx2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/settings/components/form/blacklist-form.jsx b/src/settings/components/form/blacklist-form.jsx
index 9cb547b..4333929 100644
--- a/src/settings/components/form/blacklist-form.jsx
+++ b/src/settings/components/form/blacklist-form.jsx
@@ -34,7 +34,7 @@ class BlacklistForm extends Component {
let name = e.target.name;
let index = e.target.getAttribute('data-index');
- let next = this.props.value.slice();
+ let next = this.props.value ? this.props.value.slice() : [];
if (name === 'url') {
next[index] = e.target.value;