diff --git a/internal/router/client_info.go b/internal/router/client_info.go
index 1548c67..97446c0 100644
--- a/internal/router/client_info.go
+++ b/internal/router/client_info.go
@@ -105,7 +105,7 @@ func dnsmasqReadClientInfoReader(reader io.Reader) error {
 	r := routerPlatform.Load()
 	return lineread.Reader(reader, func(line []byte) error {
 		fields := bytes.Fields(line)
-		if len(fields) != 5 {
+		if len(fields) < 4 {
 			return nil
 		}
 		mac := string(fields[1])
diff --git a/internal/router/client_info_test.go b/internal/router/client_info_test.go
index 5ea8b65..fac801c 100644
--- a/internal/router/client_info_test.go
+++ b/internal/router/client_info_test.go
@@ -78,6 +78,12 @@ lease 192.168.1.2 {
 			iscDHCPReadClientInfoReader,
 			"00:00:00:00:00:02",
 		},
+		{
+			"",
+			`1685794060 00:00:00:00:00:04 192.168.0.209 cuonglm-ThinkPad-X1-Carbon-Gen-9 00:00:00:00:00:04 9`,
+			dnsmasqReadClientInfoReader,
+			"00:00:00:00:00:04",
+		},
 	}
 
 	for _, tc := range tests {