diff --git a/resource/v1alpha1/generated.proto b/resource/v1alpha1/generated.proto
index 5fc35e405c..2e814d155b 100644
--- a/resource/v1alpha1/generated.proto
+++ b/resource/v1alpha1/generated.proto
@@ -248,7 +248,8 @@ message ResourceClaimStatus {
   // There can be at most 32 such reservations. This may get increased in
   // the future, but not reduced.
   //
-  // +listType=set
+  // +listType=map
+  // +listMapKey=uid
   // +optional
   repeated ResourceClaimConsumerReference reservedFor = 3;
 
diff --git a/resource/v1alpha1/types.go b/resource/v1alpha1/types.go
index 9d7d4a191a..af57038403 100644
--- a/resource/v1alpha1/types.go
+++ b/resource/v1alpha1/types.go
@@ -112,7 +112,8 @@ type ResourceClaimStatus struct {
 	// There can be at most 32 such reservations. This may get increased in
 	// the future, but not reduced.
 	//
-	// +listType=set
+	// +listType=map
+	// +listMapKey=uid
 	// +optional
 	ReservedFor []ResourceClaimConsumerReference `json:"reservedFor,omitempty" protobuf:"bytes,3,opt,name=reservedFor"`