diff --git a/docs/ChangeLog.md b/docs/ChangeLog.md
index 9aafbdc4..15010748 100644
--- a/docs/ChangeLog.md
+++ b/docs/ChangeLog.md
@@ -133,6 +133,7 @@
 - complete (`source:command`): exclude inactive aliases `#D1715` d6242a7
 - complete (`source:command`): not quote aliases and keywords `#D1715` d6242a7
 - highlight (`wtype=CTX_CMDI`): check alias names before shell expansions `#D1715` d6242a7
+  - util (`ble/is-alias`): fix a bug of unredirected error messages for bash-3.2 (fixup d6242a7) `#D1730` 0000000
 
 ## Fixes
 
@@ -245,7 +246,7 @@
   - prompt: fix not properly set `$?` in `${PS1@P}` evaluation (reported by nihilismus) `#D1644` 521aff9
 - decode: cache `inputrc` translations `#D1652` 994e2a5
 - complete: use `awk` for batch `quote-insert` (motivated by banoris) `#D1714` a0b2ad2 92d9734
-  - complete (quote-insert.batch): fix regex escaping in bracket expr of awk (reported by telometto) `#D1729` 0000000
+  - complete (quote-insert.batch): fix regex escaping in bracket expr of awk (reported by telometto) `#D1729` 8039b77
 
 ## Compatibility
 
diff --git a/note.txt b/note.txt
index 1d72c131..363a814e 100644
--- a/note.txt
+++ b/note.txt
@@ -5797,6 +5797,9 @@ bash_tips
 
 2022-01-09
 
+  * bash-3.2 で alias 云々のエラーメッセージが出る様になっている [#D1730]
+    これは単純に alias チェックの際に 2>/dev/null を忘れているのが原因。
+
   * complete: gawk regex warning (reported by telometto) [#D1729]
     https://github.com/akinomyoga/ble.sh/issues/167
 
diff --git a/src/util.sh b/src/util.sh
index 5104052b..1eb4932b 100644
--- a/src/util.sh
+++ b/src/util.sh
@@ -2962,11 +2962,11 @@ if ((_ble_bash>=40000)); then
   }
 else
   function ble/is-alias {
-    [[ $1 != *=* ]] && alias "$1" >/dev/null
+    [[ $1 != *=* ]] && alias "$1" &>/dev/null
   }
   function ble/alias#active {
     shopt -q expand_aliases &&
-      [[ $1 != *=* ]] && alias "$1" >/dev/null
+      [[ $1 != *=* ]] && alias "$1" &>/dev/null
   }
   function ble/alias#expand {
     ret=$1