diff --git a/lib/rdstation/error_handler/invalid_refresh_token.rb b/lib/rdstation/error_handler/invalid_refresh_token.rb
index ead6c72..dfad727 100644
--- a/lib/rdstation/error_handler/invalid_refresh_token.rb
+++ b/lib/rdstation/error_handler/invalid_refresh_token.rb
@@ -10,7 +10,8 @@ def initialize(errors)
       end
 
       def raise_error
-        return if invalid_refresh_token_error.empty?
+        return unless invalid_refresh_token_error
+
         raise RDStation::Error::InvalidRefreshToken, invalid_refresh_token_error
       end