diff --git a/src/plugins/hotkeyPlugin.ts b/src/plugins/hotkeyPlugin.ts
index 816bb0c88a..1331354e6a 100644
--- a/src/plugins/hotkeyPlugin.ts
+++ b/src/plugins/hotkeyPlugin.ts
@@ -324,7 +324,7 @@ export const eventToCombination = (event: KeyboardEvent): HotkeyCombination => {
   ) {
     recordedCombination += eventKey;
   }
-  // 末尾がスペースならそれを削除
+  // 修飾キーのみだった場合末尾がスペースになるので削除
   recordedCombination = recordedCombination.replace(/\s$/, "");
   return HotkeyCombination(recordedCombination);
 };