2 files changed, 4 insertions, 3 deletions
diff --git a/absl/flags/internal/flag.h b/absl/flags/internal/flag.h
index 83548143..e6bade0a 100644
--- a/absl/flags/internal/flag.h
+++ b/absl/flags/internal/flag.h
@@ -721,8 +721,9 @@ struct FlagRegistrarEmpty {};
 template <typename T, bool do_register>
 class FlagRegistrar {
  public:
-  explicit FlagRegistrar(Flag<T>& flag) : flag_(flag) {
-    if (do_register) flags_internal::RegisterCommandLineFlag(flag_.impl_);
+  explicit FlagRegistrar(Flag<T>& flag, const char* filename) : flag_(flag) {
+    if (do_register)
+      flags_internal::RegisterCommandLineFlag(flag_.impl_, filename);
   }
 
   FlagRegistrar OnUpdate(FlagCallbackFunc cb) && {
diff --git a/absl/flags/internal/registry.h b/absl/flags/internal/registry.h
index a8d9eb9c..4b68c85f 100644
--- a/absl/flags/internal/registry.h
+++ b/absl/flags/internal/registry.h
@@ -36,7 +36,7 @@ void ForEachFlag(std::function<void(CommandLineFlag&)> visitor);
 
 //-----------------------------------------------------------------------------
 
-bool RegisterCommandLineFlag(CommandLineFlag&);
+bool RegisterCommandLineFlag(CommandLineFlag&, const char* filename);
 
 void FinalizeRegistry();