1 files changed, 4 insertions, 0 deletions
diff --git a/options/m_option.h b/options/m_option.h
index 4066a36d81..e77452af69 100644
--- a/options/m_option.h
+++ b/options/m_option.h
@@ -333,6 +333,10 @@ struct m_option {
 
     // Initialize variable to given default before parsing options
     const void *defval;
+
+    // Print a warning when this option is used (for options with no direct
+    // replacement.)
+    const char *deprecation_message;
 };