diff --git a/gcc/analyzer/varargs.cc b/gcc/analyzer/varargs.cc
index 1da5a46..daa937d 100644
--- a/gcc/analyzer/varargs.cc
+++ b/gcc/analyzer/varargs.cc
@@ -652,7 +652,7 @@
 class kf_va_start : public known_function
 {
 public:
-  bool matches_call_types_p (const call_details &) const
+  bool matches_call_types_p (const call_details &) const final override
   {
     return true;
   }
@@ -704,7 +704,7 @@
 class kf_va_copy : public known_function
 {
 public:
-  bool matches_call_types_p (const call_details &cd) const
+  bool matches_call_types_p (const call_details &) const final override
   {
     return true;
   }