diff --git a/packages/flutter_simple_treeview/lib/src/primitives/key_provider.dart b/packages/flutter_simple_treeview/lib/src/primitives/key_provider.dart
index 2e788ef0..8130e983 100644
--- a/packages/flutter_simple_treeview/lib/src/primitives/key_provider.dart
+++ b/packages/flutter_simple_treeview/lib/src/primitives/key_provider.dart
@@ -22,7 +22,7 @@ class KeyProvider {
       return _TreeNodeKey(_nextIndex++);
     }
     if (_keys.contains(originalKey)) {
-      throw ArgumentError('There should not be nodes with the same kays. '
+      throw ArgumentError('There should not be nodes with the same keys. '
           'Duplicate value found: $originalKey.');
     }
     _keys.add(originalKey);