diff --git a/lib/oauth2_basic_authenticator.rb b/lib/oauth2_basic_authenticator.rb
index f6a3d51..4ab75f0 100644
--- a/lib/oauth2_basic_authenticator.rb
+++ b/lib/oauth2_basic_authenticator.rb
@@ -114,7 +114,7 @@ class OAuth2BasicAuthenticator < Auth::ManagedAuthenticator
       segments = parse_segments(path)
       val = walk_path(user_json, segments)
       # [] should be nil, false should be false
-      result[prop] = val.blank? ? (val == [] ? nil : val) : val
+      result[prop] = val.presence || (val == [] ? nil : val)
     end
   end