diff --git a/docs/async-api/async-api.json b/docs/async-api/async-api.json
index 09817a99..2d69084b 100644
--- a/docs/async-api/async-api.json
+++ b/docs/async-api/async-api.json
@@ -251,7 +251,7 @@
                     "redirectUrl": {
                         "type": "string",
                         "nullable":  true,
-                        "description": "The URL to which the visitor was redirected"
+                        "description": "The URL to which the visitor was redirected, or null if a redirect did not occur, like for 404 requests or pixel tracking"
                     }
                 },
                 "example": {
diff --git a/docs/swagger/definitions/Visit.json b/docs/swagger/definitions/Visit.json
index 826ad1ac..2ccdfd23 100644
--- a/docs/swagger/definitions/Visit.json
+++ b/docs/swagger/definitions/Visit.json
@@ -28,7 +28,7 @@
         },
         "redirectUrl": {
             "type": ["string", "null"],
-            "description": "The URL to which the visitor was redirected"
+            "description": "The URL to which the visitor was redirected, or null if a redirect did not occur, like for 404 requests or pixel tracking"
         }
     }
 }