diff --git a/src/web/app/desktop/scripts/autocomplete.js b/src/web/app/desktop/scripts/autocomplete.js
index 54985874d6..a87a64418e 100644
--- a/src/web/app/desktop/scripts/autocomplete.js
+++ b/src/web/app/desktop/scripts/autocomplete.js
@@ -88,7 +88,7 @@ class Autocomplete {
 	 * [Private] サジェストを閉じます。
 	 */
 	close() {
-		if (this.suggestion == nul) return;
+		if (this.suggestion == null) return;
 
 		this.suggestion.unmount();
 		this.suggestion = null;