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-rw-r--r--absl/strings/internal/ostringstream.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/absl/strings/internal/ostringstream.h b/absl/strings/internal/ostringstream.h
index 017632a9292e..013146599d3d 100644
--- a/absl/strings/internal/ostringstream.h
+++ b/absl/strings/internal/ostringstream.h
@@ -75,7 +75,7 @@ class OStringStream : private std::basic_streambuf<char>, public std::ostream {
  private:
   using Buf = std::basic_streambuf<char>;
 
-  Buf::int_type overflow(int c = Buf::traits_type::eof()) override {
+  Buf::int_type overflow(int c) override {
     assert(s_);
     if (!Buf::traits_type::eq_int_type(c, Buf::traits_type::eof()))
       s_->push_back(static_cast<char>(c));