diff --git a/auth/middleware.go b/auth/middleware.go
index 5cce228..361bb62 100644
--- a/auth/middleware.go
+++ b/auth/middleware.go
@@ -217,7 +217,7 @@ type InternalAuth struct {
 	NodeID string `json:"node_id"`
 
 	// Only used by specific meta.sr.ht routes
-	OAuthClientUUID string `json:"oauth_client_id,omit-empty"`
+	OAuthClientUUID string `json:"oauth_client_id,omitempty"`
 }
 
 func internalAuth(internalNet []*net.IPNet, payload []byte,