diff --git a/src/stmt.rs b/src/stmt.rs
index 5382224..ffc5243 100644
--- a/src/stmt.rs
+++ b/src/stmt.rs
@@ -33,10 +33,8 @@ pub enum Statement {
     /// anonymous or named counter.
     Counter(Counter),
     Mangle(Mangle),
-    Quota(Quota),
-    #[serde(rename = "quota")]
-    /// reference to a named quota object
-    QuotaRef(String),
+    /// anonymous or named quota.
+    Quota(QuotaOrQuotaRef),
     // TODO: last
     Limit(Limit),
 
@@ -155,6 +153,16 @@ pub struct Mangle {
     pub value: Expression,
 }
 
+#[derive(Debug, Clone, Eq, PartialEq, Serialize, Deserialize)]
+#[serde(untagged)]
+/// Represents an anonymous or named quota object.
+pub enum QuotaOrQuotaRef {
+    /// Anonymous quota object.
+    Quota(Quota),
+    /// Reference to a named quota object.
+    QuotaRef(String),
+}
+
 #[derive(Debug, Clone, Eq, PartialEq, Serialize, Deserialize)]
 /// Creates an anonymous quota which lives in the rule it appears in.
 pub struct Quota {