diff --git a/scripts/gateway-watchdog.sh b/scripts/gateway-watchdog.sh
index 65b7379..0e61bf4 100755
--- a/scripts/gateway-watchdog.sh
+++ b/scripts/gateway-watchdog.sh
@@ -146,7 +146,7 @@ _safe_count() {
     count=$(grep -c "$1" 2>/dev/null || true)
     # 去掉所有空白和换行，确保是纯数字
     count=$(echo "$count" | tr -d '[:space:]')
-    [ -z "$count" ] && count=0
+    if [ -z "$count" ]; then count=0; fi
     echo "$count"
 }