diff --git a/message/message.go b/message/message.go
index ea9a5bd..9fe0eb2 100644
--- a/message/message.go
+++ b/message/message.go
@@ -161,7 +161,7 @@ type HostNetworkMetadata struct {
 	ID    string       `json:"id"`
 	Name  string       `json:"name"`
 	Curve NetworkCurve `json:"curve"`
-	CIDR  string       `json:"string"`
+	CIDR  string       `json:"cidr"`
 }
 
 // HostHostMetadata is included in EnrollResponseData.