diff --git a/src/commands.cc b/src/commands.cc
index 4db9048f..65328f01 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -1147,6 +1147,7 @@ struct DisableOption {
 
     ~DisableOption() { m_option.set(m_prev_value); }
 
+private:
     Option& m_option;
     T m_prev_value;
 };