diff --git a/absl/strings/str_split.h b/absl/strings/str_split.h
index 761568a..cf53ccf 100644
--- a/absl/strings/str_split.h
+++ b/absl/strings/str_split.h
@@ -127,7 +127,7 @@
   absl::string_view Find(absl::string_view text, size_t pos) const;
 
  private:
-  const std::string delimiter_;
+  std::string delimiter_;
 };
 
 // ByAsciiWhitespace