diff --git a/src/routes/users.js b/src/routes/users.js
index d51b49423..644f7dcda 100644
--- a/src/routes/users.js
+++ b/src/routes/users.js
@@ -75,7 +75,10 @@ function update(req, res, next) {
         if (users.compareRoles(req.user.role, req.body.role) < 0) return next(new HttpError(403, `role '${req.body.role}' is required but user has only '${req.user.role}'`));
     }
 
-    if ('active' in req.body && typeof req.body.active !== 'boolean') return next(new HttpError(400, 'active must be a boolean'));
+    if ('active' in req.body) {
+        if (typeof req.body.active !== 'boolean') return next(new HttpError(400, 'active must be a boolean'));
+        if (req.user.id === req.resource.id) return next(new HttpError(409, 'Cannot set active flag on self'));
+    }
 
     users.update(req.resource, req.body, auditSource.fromRequest(req), function (error) {
         if (error) return next(BoxError.toHttpError(error));