diff --git a/3-5-compute.sh b/3-5-compute.sh
index f0787f8..6f7668b 100755
--- a/3-5-compute.sh
+++ b/3-5-compute.sh
@@ -252,8 +252,11 @@ chrony_synced() {
     local sources
     sources=$(timeout 10 chronyc -n sources) || return 1
     printf '%s\n' "$sources" | awk -v ip="$CONTROLLER_IP" '
-        $1=="^*" && $2==ip {found=1}
-        $1 ~ /^[\^=]/ && $2!=ip {bad=1}
+        # 时间源标记只有两个字符（如 ^*、^?、=+）；排除表头的等号分隔线。
+        length($1)==2 && (substr($1,1,1)=="^" || substr($1,1,1)=="=") {
+            if($1=="^*" && $2==ip) found=1
+            if($2!=ip) bad=1
+        }
         END{exit !(found && !bad)}'
 }
 check 2 'chrony 已安装' 'chrony 未安装（第1步：安装软件）' rpm -q chrony