diff --git a/server/etcdserver/api/etcdhttp/metrics.go b/server/etcdserver/api/etcdhttp/metrics.go
index e6f28335d0ea..35e6f61da4ec 100644
--- a/server/etcdserver/api/etcdhttp/metrics.go
+++ b/server/etcdserver/api/etcdhttp/metrics.go
@@ -139,13 +139,7 @@ func getExcludedAlarms(r *http.Request) (alarms AlarmSet) {
 }
 
 func getSerializableFlag(r *http.Request) bool {
-	serializable, found := r.URL.Query()["serializable"]
-	if found {
-		if len(serializable) == 1 && serializable[0] == "true" {
-			return true
-		}
-	}
-	return false
+	return r.URL.Query().Get("serializable") == "true"
 }
 
 // TODO: etcdserver.ErrNoLeader in health API