diff --git a/cmd/geth/testdata/logging/logtest-json.txt b/cmd/geth/testdata/logging/logtest-json.txt
index b7e928a168..49c83480e9 100644
--- a/cmd/geth/testdata/logging/logtest-json.txt
+++ b/cmd/geth/testdata/logging/logtest-json.txt
@@ -48,5 +48,5 @@
 {"time":"2023-11-22T15:42:00.40835+08:00","level":"INFO","msg":"raw nil","res":null}
 {"time":"2023-11-22T15:42:00.408354+08:00","level":"INFO","msg":"(*uint64)(nil)","res":null}
 {"time":"2023-11-22T15:42:00.408361+08:00","level":"INFO","msg":"Using keys 't', 'level', 'time', 'level' and 'msg'","time":"time","t":"t","level":"level","lvl":"lvl","msg":"msg"}
-{"time":"2023-11-29T15:13:00.195655931+01:00","level":"INFO","msg":"Odd pair (1 attr)","key":null,"LOG_ERROR":"Normalized odd number of arguments by adding nil"}
-{"time":"2023-11-29T15:13:00.195681832+01:00","level":"INFO","msg":"Odd pair (3 attr)","key":"value","key2":null,"LOG_ERROR":"Normalized odd number of arguments by adding nil"}
+{"time":"2023-11-29T15:13:00.195655931+01:00","level":"INFO","msg":"Odd pair (1 attr)","!BADKEY":"key"}
+{"time":"2023-11-29T15:13:00.195681832+01:00","level":"INFO","msg":"Odd pair (3 attr)","key":"value","!BADKEY":"key2"}
diff --git a/cmd/geth/testdata/logging/logtest-logfmt.txt b/cmd/geth/testdata/logging/logtest-logfmt.txt
index 2ac38ee6b8..67bd8773c2 100644
--- a/cmd/geth/testdata/logging/logtest-logfmt.txt
+++ b/cmd/geth/testdata/logging/logtest-logfmt.txt
@@ -48,5 +48,5 @@ time=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx level=INFO msg=nil-custom-struct res=<nil>
 time=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx level=INFO msg="raw nil" res=<nil>
 time=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx level=INFO msg=(*uint64)(nil) res=<nil>
 time=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx level=INFO msg="Using keys 't', 'lvl', 'time', 'level' and 'msg'" t=t time=time lvl=lvl level=level msg=msg
-time=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx level=INFO msg="Odd pair (1 attr)" key=<nil> LOG_ERROR="Normalized odd number of arguments by adding nil"
-time=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx level=INFO msg="Odd pair (3 attr)" key=value key2=<nil> LOG_ERROR="Normalized odd number of arguments by adding nil"
+time=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx level=INFO msg="Odd pair (1 attr)" !BADKEY=key
+time=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx level=INFO msg="Odd pair (3 attr)" key=value !BADKEY=key2
diff --git a/cmd/geth/testdata/logging/logtest-terminal.txt b/cmd/geth/testdata/logging/logtest-terminal.txt
index e3b562117c..8038353621 100644
--- a/cmd/geth/testdata/logging/logtest-terminal.txt
+++ b/cmd/geth/testdata/logging/logtest-terminal.txt
@@ -49,5 +49,5 @@ INFO [xx-xx|xx:xx:xx.xxx] nil-custom-struct                        res=<nil>
 INFO [xx-xx|xx:xx:xx.xxx] raw nil                                  res=<nil>
 INFO [xx-xx|xx:xx:xx.xxx] (*uint64)(nil)                           res=<nil>
 INFO [xx-xx|xx:xx:xx.xxx] Using keys 't', 'lvl', 'time', 'level' and 'msg' t=t time=time lvl=lvl level=level msg=msg
-INFO [xx-xx|xx:xx:xx.xxx] Odd pair (1 attr)                        key=<nil>                  LOG_ERROR="Normalized odd number of arguments by adding nil"
-INFO [xx-xx|xx:xx:xx.xxx] Odd pair (3 attr)                        key=value                  key2=<nil> LOG_ERROR="Normalized odd number of arguments by adding nil"
+INFO [xx-xx|xx:xx:xx.xxx] Odd pair (1 attr)                        "!BADKEY"=key
+INFO [xx-xx|xx:xx:xx.xxx] Odd pair (3 attr)                        key=value                  "!BADKEY"=key2
diff --git a/log/logger.go b/log/logger.go
index 93d62f080b..83ff0c7d92 100644
--- a/log/logger.go
+++ b/log/logger.go
@@ -159,9 +159,6 @@ func (l *logger) Write(level slog.Level, msg string, attrs ...any) {
 	var pcs [1]uintptr
 	runtime.Callers(3, pcs[:])
 
-	if len(attrs)%2 != 0 {
-		attrs = append(attrs, nil, errorKey, "Normalized odd number of arguments by adding nil")
-	}
 	r := slog.NewRecord(time.Now(), level, msg, pcs[0])
 	r.Add(attrs...)
 	l.inner.Handler().Handle(context.Background(), r)