diff --git a/data/api/client-server/definitions/user_identifier.yaml b/data/api/client-server/definitions/user_identifier.yaml
index d2d88fe4..add848fd 100644
--- a/data/api/client-server/definitions/user_identifier.yaml
+++ b/data/api/client-server/definitions/user_identifier.yaml
@@ -24,4 +24,4 @@ properties:
 required:
   - type
 additionalProperties:
-  description: Keys dependent on the identification type
+  description: Keys dependent on the identification type.