diff --git a/auth/middleware.go b/auth/middleware.go
index 5cce22885fa751e7e2f59c2c5221bffa17de805e..361bb62e4cdf81595872d7df4b2fcfb46698ab6b 100644
--- a/auth/middleware.go
+++ b/auth/middleware.go
@@ -217,7 +217,7 @@ 	// An arbitrary identifier for this internal node, e.g. "us-east-3.git.sr.ht"
 	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,